US2013281296A1PendingUtilityA1

Compunds and processes that generate cyclopropenes and substituted cyclopropenes on demand

49
Individually held — no corporate assignee on recordPriority: Mar 23, 2011Filed: Jun 4, 2013Published: Oct 24, 2013
Est. expiryMar 23, 2031(~4.6 yrs left)· nominal 20-yr term from priority
Inventors:Cheryl D. StevensonJohn P. Davis
C07C 49/573C07D 305/14C07C 69/757C07C 69/753C07C 2603/66A01N 27/00A01N 3/00C07C 1/2078
49
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Claims

Abstract

Compounds and methods that release 1-methylcyclopropene, 1-trifluoromethylcyclopropene, and other substituted cyclopropenes are disclosed. The compounds and methods overcome present limitations for storage, transportation, and application of the cyclopropene containing compounds by using light, including sunlight, and/or heat as the primary release trigger. Additional products released include innocuous gases and value added aryl-group compounds.

Claims

exact text as granted — not AI-modified
The invention claimed is: 
     
         1 . A compound of the formula: 
       
         
           
           
               
               
           
         
       
       wherein:
 R 1  is hydrogen (—H), chlorine (—Cl), or fluorine (—F) atom, or group comprised of methyl (—CH 3 ), ethyl (—CH 2 CH 3 ), ethylene (—CHCH 2 ), ethyne (—CCH), n-propyl (—CH 2 CH 2 CH 3 ), iso-propyl (—CH(CH 3 ) 2 ), cyclopropyl (—CH(CH 2 ) 2 ), tert-butyl (—C(CH 3 ) 3 ), propene (—CHCHCH 3  or —CH 2 CHCH 2 ), cyclopropene (—CH(CH) 2  or —C(CH)CH 2 ), propyne (—CCCH 3  or —CH 2 CCH), hydroxyl (—OH), methylalcohol (—CH 2 OH), ethylalcohol (—CH 2 CH 2 OH or —CH(OH)CH 3 ), ethyldiol (—CH(OH)CH 2 (OH)), propanol (—CH(OH)CH 2 CH 3  or —CH 2 CH(OH)CH 3  or —CH 2 CH 2 CH 2 OH), propandiol (—CH(OH)CH(OH)CH 3  or —CH(OH)CH 2 CH 2 OH or —CH 2 CH(OH)CH 2 OH), methylether (—OCH 3 ), ethylether (—OCH 2 CH 3 ), fluoromethyl (—CH 2 F), difluoromethyl (—CHF 2 ), trifluoromethyl (—CF 3 ), fluoroethyl (—CFHCH 3  or —CH 2 CH 2 F), perfluoroethyl (—CF 2 CF 3 ), fluoropropyl (—CHFCH 2 CH 3  or —CH 2 CHFCH 3  or —CH 2 CH 2 CH 2 F), perfluoropropyl (—CF 2 CF 2 CF 3  or —CF(CF 2 ) 2 ), chloromethyl (—CH 2 Cl), dichloromethyl (—CHCl 2 ), trichloromethyl (—CCl 3 ), chloroethyl (—CClHCH 3  or —CH 2 CH 2 Cl), perchloroethyl (—CCl 2 CCl 3 ), chloropropyl (—CHClCH 2 CH 3  or —CH 2 CHClCH 3  or —CH 2 CH 2 CH 2 Cl), perchloropropyl (—CCl 2 CCl 2 CCl 3  or —CCl(CCl 2 ) 2 ), cyano (—CN), aldehyde (—C(O)H), carboxylic acid (—C(O)OH), carboxylate (—C(O)O − ), carbomethoxy (—C(O)OCH 3 ), carboethoxy (—C(O)OCH 2 CH 3 ), dimethyl amine (—N(CH 3 ) 2 ), or acid chloride (—C(O)Cl); 
 R 2  is hydrogen (—H), chlorine (—Cl), or fluorine (—F) atom, or group comprised of methyl (—CH 3 ), ethyl (—CH 2 CH 3 ), ethylene (—CHCH 2 ), ethyne (—CCH), n-propyl (—CH 2 CH 2 CH 3 ), iso-propyl (—CH(CH 3 ) 2 ), cyclopropyl (—CH(CH 2 ) 2 ), tert-butyl (—C(CH 3 ) 3 ), propene (—CHCHCH 3  or —CH 2 CHCH 2 ), cyclopropene (—CH(CH) 2  or —C(CH)CH 2 ), propyne (—CCCH 3  or —CH 2 CCH), hydroxyl (—OH), methylalcohol (—CH 2 OH), ethylalcohol (—CH 2 CH 2 OH or —CH(OH)CH 3 ), ethyldiol (—CH(OH)CH 2 (OH)), propanol (—CH(OH)CH 2 CH 3  or —CH 2 CH(OH)CH 3  or —CH 2 CH 2 CH 2 OH), propandiol (—CH(OH)CH(OH)CH 3  or —CH(OH)CH 2 CH 2 OH or —CH 2 CH(OH)CH 2 OH), methylether (—OCH 3 ), ethylether (—OCH 2 CH 3 ), fluoromethyl (—CH 2 F), difluoromethyl (—CHF 2 ), trifluoromethyl (—CF 3 ), fluoroethyl (—CFHCH 3  or —CH 2 CH 2 F), perfluoroethyl (—CF 2 CF 3 ), fluoropropyl (—CHFCH 2 CH 3  or —CH 2 CHFCH 3  or —CH 2 CH 2 CH 2 F), perfluoropropyl (—CF 2 CF 2 CF 3  or —CF(CF 2 ) 2 ), chloromethyl (—CH 2 Cl), dichloromethyl (—CHCl 2 ), trichloromethyl (—CCl 3 ), chloroethyl (—CClHCH 3  or —CH 2 CH 2 Cl), perchloroethyl (—CCl 2 CCl 3 ), chloropropyl (—CHClCH 2 CH 3  or —CH 2 CHClCH 3  or —CH 2 CH 2 CH 2 Cl), perchloropropyl (—CCl 2 CCl 2 CCl 3  or —CCl(CCl 2 ) 2 ), cyano (—CN), aldehyde (—C(O)H), carboxylic acid (—C(O)OH), carboxylate (—C(O)O − ), carbomethoxy (—C(O)OCH 3 ), carboethoxy (—C(O)OCH 2 CH 3 ), dimethyl amine (—N(CH 3 ) 2 ), or acid chloride (—C(O)Cl); 
 R 3  is hydrogen (—H), chlorine (—Cl), or fluorine (—F) atom, or group comprised of methyl (—CH 3 ), ethyl (—CH 2 CH 3 ), ethylene (—CHCH 2 ), ethyne (—CCH), n-propyl (—CH 2 CH 2 CH 3 ), iso-propyl (—CH(CH 3 ) 2 ), cyclopropyl (—CH(CH 2 ) 2 ), tert-butyl (—C(CH 3 ) 3 ), propene (—CHCHCH 3  or —CH 2 CHCH 2 ), cyclopropene (—CH(CH) 2  or —C(CH)CH 2 ), propyne (—CCCH 3  or —CH 2 CCH), hydroxyl (—OH), methylalcohol (—CH 2 OH), ethylalcohol (—CH 2 CH 2 OH or —CH(OH)CH 3 ), ethyldiol (—CH(OH)CH 2 (OH)), propanol (—CH(OH)CH 2 CH 3  or —CH 2 CH(OH)CH 3  or —CH 2 CH 2 CH 2 OH), propandiol (—CH(OH)CH(OH)CH 3  or —CH(OH)CH 2 CH 2 OH or —CH 2 CH(OH)CH 2 OH), methylether (—OCH 3 ), ethylether (—OCH 2 CH 3 ), fluoromethyl (—CH 2 F), difluoromethyl (—CHF 2 ), trifluoromethyl (—CF 3 ), fluoroethyl (—CFHCH 3  or —CH 2 CH 2 F), perfluoroethyl (—CF 2 CF 3 ), fluoropropyl (—CHFCH 2 CH 3  or —CH 2 CHFCH 3  or —CH 2 CH 2 CH 2 F), perfluoropropyl (—CF 2 CF 2 CF 3  or —CF(CF 2 ) 2 ), chloromethyl (—CH 2 Cl), dichloromethyl (—CHCl 2 ), trichloromethyl (—CCl 3 ), chloroethyl (—CClHCH 3  or —CH 2 CH 2 Cl), perchloroethyl (—CCl 2 CCl 3 ), chloropropyl (—CHClCH 2 CH 3  or —CH 2 CHClCH 3  or —CH 2 CH 2 CH 2 Cl), perchloropropyl (—CCl 2 CCl 2 CCl 3  or —CCl(CCl 2 ) 2 ), cyano (—CN), aldehyde (—C(O)H), carboxylic acid (—C(O)OH), carboxylate (—C(O)O − ), carbomethoxy (—C(O)OCH 3 ), carboethoxy (—C(O)OCH 2 CH 3 ), dimethyl amine (—N(CH 3 ) 2 ), or acid chloride (—C(O)Cl); 
 R 4  is hydrogen (—H), chlorine (—Cl), or fluorine (—F) atom, or group comprised of methyl (—CH 3 ), ethyl (—CH 2 CH 3 ), ethylene (—CHCH 2 ), ethyne (—CCH), n-propyl (—CH 2 CH 2 CH 3 ), iso-propyl (—CH(CH 3 ) 2 ), cyclopropyl (—CH(CH 2 ) 2 ), tert-butyl (—C(CH 3 ) 3 ), propene (—CHCHCH 3  or —CH 2 CHCH 2 ), cyclopropene (—CH(CH) 2  or —C(CH)CH 2 ), propyne (—CCCH 3  or —CH 2 CCH), hydroxyl (—OH), methylalcohol (—CH 2 OH), ethylalcohol (—CH 2 CH 2 OH or —CH(OH)CH 3 ), ethyldiol (—CH(OH)CH 2 (OH)), propanol (—CH(OH)CH 2 CH 3  or —CH 2 CH(OH)CH 3  or —CH 2 CH 2 CH 2 OH), propandiol (—CH(OH)CH(OH)CH 3  or —CH(OH)CH 2 CH 2 OH or —CH 2 CH(OH)CH 2 OH), methylether (—OCH 3 ), ethylether (—OCH 2 CH 3 ), fluoromethyl (—CH 2 F), difluoromethyl (—CHF 2 ), trifluoromethyl (—CF 3 ), fluoroethyl (—CFHCH 3  or —CH 2 CH 2 F), perfluoroethyl (—CF 2 CF 3 ), fluoropropyl (—CHFCH 2 CH 3  or —CH 2 CHFCH 3  or —CH 2 CH 2 CH 2 F), perfluoropropyl (—CF 2 CF 2 CF 3  or —CF(CF 2 ) 2 ), chloromethyl (—CH 2 Cl), dichloromethyl (—CHCl 2 ), trichloromethyl (—CCl 3 ), chloroethyl (—CClHCH 3  or —CH 2 CH 2 Cl), perchloroethyl (—CCl 2 CCl 3 ), chloropropyl (—CHClCH 2 CH 3  or —CH 2 CHClCH 3  or —CH 2 CH 2 CH 2 Cl), perchloropropyl (—CCl 2 CCl 2 CCl 3  or —CCl(CCl 2 ) 2 ), cyano (—CN), aldehyde (—C(O)H), carboxylic acid (—C(O)OH), carboxylate (—C(O)O − ), carbomethoxy (—C(O)OCH 3 ), carboethoxy (—C(O)OCH 2 CH 3 ), dimethyl amine (—N(CH 3 ) 2 ), or acid chloride (—C(O)Cl); 
 R 5  is methyl (—CH 3 ), ethyl (—CH 2 CH 3 ), propyl (—CH 2 CH 2 CH 3 ), or methylene (—CH 2 —), or methylethylene (—CH(CH 3 )—); and 
 R 6  is methyl (—CH 3 ), ethyl (—CH 2 CH 3 ), propyl (—CH 2 CH 2 CH 3 ), methylene (—CH 2 —), or methylethylene (—CH(CH 3 )—). 
 
     
     
         2 . A compound of the formula: 
       
         
           
           
               
               
           
         
       
       wherein:
 R 1  is hydrogen (—H), chlorine (—Cl), or fluorine (—F) atom, or group comprised of methyl (—CH 3 ), ethyl (—CH 2 CH 3 ), ethylene (—CHCH 2 ), ethyne (—CCH), n-propyl (—CH 2 CH 2 CH 3 ), iso-propyl (—CH(CH 3 ) 2 ), cyclopropyl (—CH(CH 2 ) 2 ), tert-butyl (—C(CH 3 ) 3 ), propene (—CHCHCH 3  or —CH 2 CHCH 2 ), cyclopropene (—CH(CH) 2  or —C(CH)CH 2 ), propyne (—CCCH 3  or —CH 2 CCH), hydroxyl (—OH), methylalcohol (—CH 2 OH), ethylalcohol (—CH 2 CH 2 OH or —CH(OH)CH 3 ), ethyldiol (—CH(OH)CH 2 (OH)), propanol (—CH(OH)CH 2 CH 3  or —CH 2 CH(OH)CH 3  or —CH 2 CH 2 CH 2 OH), propandiol (—CH(OH)CH(OH)CH 3  or —CH(OH)CH 2 CH 2 OH or —CH 2 CH(OH)CH 2 OH), methylether (—OCH 3 ), ethylether (—OCH 2 CH 3 ), fluoromethyl (—CH 2 F), difluoromethyl (—CHF 2 ), trifluoromethyl (—CF 3 ), fluoroethyl (—CFHCH 3  or —CH 2 CH 2 F), perfluoroethyl (—CF 2 CF 3 ), fluoropropyl (—CHFCH 2 CH 3  or —CH 2 CHFCH 3  or —CH 2 CH 2 CH 2 F), perfluoropropyl (—CF 2 CF 2 CF 3  or —CF(CF 2 ) 2 ), chloromethyl (—CH 2 Cl), dichloromethyl (—CHCl 2 ), trichloromethyl (—CCl 3 ), chloroethyl (—CClHCH 3  or —CH 2 CH 2 Cl), perchloroethyl (—CCl 2 CCl 3 ), chloropropyl (—CHClCH 2 CH 3  or —CH 2 CHClCH 3  or —CH 2 CH 2 CH 2 Cl), perchloropropyl (—CCl 2 CCl 2 CCl 3  or —CCl(CCl 2 ) 2 ), cyano (—CN), aldehyde (—C(O)H), carboxylic acid (—C(O)OH), carboxylate (—C(O)O − ), carbomethoxy (—C(O)OCH 3 ), carboethoxy (—C(O)OCH 2 CH 3 ), dimethyl amine (—N(CH 3 ) 2 ), or acid chloride (—C(O)Cl); 
 R 2  is hydrogen (—H), chlorine (—Cl), or fluorine (—F) atom, or group comprised of methyl (—CH 3 ), ethyl (—CH 2 CH 3 ), ethylene (—CHCH 2 ), ethyne (—CCH), n-propyl (—CH 2 CH 2 CH 3 ), iso-propyl (—CH(CH 3 ) 2 ), cyclopropyl (—CH(CH 2 ) 2 ), tert-butyl (—C(CH 3 ) 3 ), propene (—CHCHCH 3  or —CH 2 CHCH 2 ), cyclopropene (—CH(CH) 2  or —C(CH)CH 2 ), propyne (—CCCH 3  or —CH 2 CCH), hydroxyl (—OH), methylalcohol (—CH 2 OH), ethylalcohol (—CH 2 CH 2 OH or —CH(OH)CH 3 ), ethyldiol (—CH(OH)CH 2 (OH)), propanol (—CH(OH)CH 2 CH 3  or —CH 2 CH(OH)CH 3  or —CH 2 CH 2 CH 2 OH), propandiol (—CH(OH)CH(OH)CH 3  or —CH(OH)CH 2 CH 2 OH or —CH 2 CH(OH)CH 2 OH), methylether (—OCH 3 ), ethylether (—OCH 2 CH 3 ), fluoromethyl (—CH 2 F), difluoromethyl (—CHF 2 ), trifluoromethyl (—CF 3 ), fluoroethyl (—CFHCH 3  or —CH 2 CH 2 F), perfluoroethyl (—CF 2 CF 3 ), fluoropropyl (—CHFCH 2 CH 3  or —CH 2 CHFCH 3  or —CH 2 CH 2 CH 2 F), perfluoropropyl (—CF 2 CF 2 CF 3  or —CF(CF 2 ) 2 ), chloromethyl (—CH 2 Cl), dichloromethyl (—CHCl 2 ), trichloromethyl (—CCl 3 ), chloroethyl (—CClHCH 3  or —CH 2 CH 2 Cl), perchloroethyl (—CCl 2 CCl 3 ), chloropropyl (—CHClCH 2 CH 3  or —CH 2 CHClCH 3  or —CH 2 CH 2 CH 2 Cl), perchloropropyl (—CCl 2 CCl 2 CCl 3  or —CCl(CCl 2 ) 2 ), cyano (—CN), aldehyde (—C(O)H), carboxylic acid (—C(O)OH), carboxylate (—C(O)O − ), carbomethoxy (—C(O)OCH 3 ), carboethoxy (—C(O)OCH 2 CH 3 ), dimethyl amine (—N(CH 3 ) 2 ), or acid chloride (—C(O)Cl); 
 R 3  is hydrogen (—H), chlorine (—Cl), or fluorine (—F) atom, or group comprised of methyl (—CH 3 ), ethyl (—CH 2 CH 3 ), ethylene (—CHCH 2 ), ethyne (—CCH), n-propyl (—CH 2 CH 2 CH 3 ), iso-propyl (—CH(CH 3 ) 2 ), cyclopropyl (—CH(CH 2 ) 2 ), tert-butyl (—C(CH 3 ) 3 ), propene (—CHCHCH 3  or —CH 2 CHCH 2 ), cyclopropene (—CH(CH) 2  or —C(CH)CH 2 ), propyne (—CCCH 3  or —CH 2 CCH), hydroxyl (—OH), methylalcohol (—CH 2 OH), ethylalcohol (—CH 2 CH 2 OH or —CH(OH)CH 3 ), ethyldiol (—CH(OH)CH 2 (OH)), propanol (—CH(OH)CH 2 CH 3  or —CH 2 CH(OH)CH 3  or —CH 2 CH 2 CH 2 OH), propandiol (—CH(OH)CH(OH)CH 3  or —CH(OH)CH 2 CH 2 OH or —CH 2 CH(OH)CH 2 OH), methylether (—OCH 3 ), ethylether (—OCH 2 CH 3 ), fluoromethyl (—CH 2 F), difluoromethyl (—CHF 2 ), trifluoromethyl (—CF 3 ), fluoroethyl (—CFHCH 3  or —CH 2 CH 2 F), perfluoroethyl (—CF 2 CF 3 ), fluoropropyl (—CHFCH 2 CH 3  or —CH 2 CHFCH 3  or —CH 2 CH 2 CH 2 F), perfluoropropyl (—CF 2 CF 2 CF 3  or —CF(CF 2 ) 2 ), chloromethyl (—CH 2 Cl), dichloromethyl (—CHCl 2 ), trichloromethyl (—CCl 3 ), chloroethyl (—CClHCH 3  or —CH 2 CH 2 Cl), perchloroethyl (—CCl 2 CCl 3 ), chloropropyl (—CHClCH 2 CH 3  or —CH 2 CHClCH 3  or —CH 2 CH 2 CH 2 Cl), perchloropropyl (—CCl 2 CCl 2 CCl 3  or —CCl(CCl 2 ) 2 ), cyano (—CN), aldehyde (—C(O)H), carboxylic acid (—C(O)OH), carboxylate (—C(O)O − ), carbomethoxy (—C(O)OCH 3 ), carboethoxy (—C(O)OCH 2 CH 3 ), dimethyl amine (—N(CH 3 ) 2 ), or acid chloride (—C(O)Cl); and 
 R 4  is hydrogen (—H), chlorine (—Cl), or fluorine (—F) atom, or group comprised of methyl (—CH 3 ), ethyl (—CH 2 CH 3 ), ethylene (—CHCH 2 ), ethyne (—CCH), n-propyl (—CH 2 CH 2 CH 3 ), iso-propyl (—CH(CH 3 ) 2 ), cyclopropyl (—CH(CH 2 ) 2 ), tert-butyl (—C(CH 3 ) 3 ), propene (—CHCHCH 3  or —CH 2 CHCH 2 ), cyclopropene (—CH(CH) 2  or —C(CH)CH 2 ), propyne (—CCCH 3  or —CH 2 CCH), hydroxyl (—OH), methylalcohol (—CH 2 OH), ethylalcohol (—CH 2 CH 2 OH or —CH(OH)CH 3 ), ethyldiol (—CH(OH)CH 2 (OH)), propanol (—CH(OH)CH 2 CH 3  or —CH 2 CH(OH)CH 3  or —CH 2 CH 2 CH 2 OH), propandiol (—CH(OH)CH(OH)CH 3  or —CH(OH)CH 2 CH 2 OH or —CH 2 CH(OH)CH 2 OH), methylether (—OCH 3 ), ethylether (—OCH 2 CH 3 ), fluoromethyl (—CH 2 F), difluoromethyl (—CHF 2 ), trifluoromethyl (—CF 3 ), fluoroethyl (—CFHCH 3  or —CH 2 CH 2 F), perfluoroethyl (—CF 2 CF 3 ), fluoropropyl (—CHFCH 2 CH 3  or —CH 2 CHFCH 3  or —CH 2 CH 2 CH 2 F), perfluoropropyl (—CF 2 CF 2 CF 3  or —CF(CF 2 ) 2 ), chloromethyl (—CH 2 Cl), dichloromethyl (—CHCl 2 ), trichloromethyl (—CCl 3 ), chloroethyl (—CClHCH 3  or —CH 2 CH 2 Cl), perchloroethyl (—CCl 2 CCl 3 ), chloropropyl (—CHClCH 2 CH 3  or —CH 2 CHClCH 3  or —CH 2 CH 2 CH 2 Cl), perchloropropyl CCl 2 CCl 2 CCl 3  or —CCl(CCl 2 ) 2 ), cyano (—CN), aldehyde (—C(O)H), carboxylic acid (—C(O)OH), carboxylate (—C(O)O − ), carbomethoxy (—C(O)OCH 3 ), carboethoxy (—C(O)OCH 2 CH 3 ), dimethyl amine (—N(CH 3 ) 2 ), or acid chloride (—C(O)Cl). 
 
     
     
         3 . A compound of the formula: 
       
         
           
           
               
               
           
         
       
       wherein:
 R 1  is hydrogen (—H), methyl (—CH 3 ), or trifluoromethyl (—CF 3 ); 
 R 2  is hydrogen; 
 R 3  is hydrogen; 
 R 4  is hydrogen, or methyl (—CH 3 ) provided that R 1  is hydrogen, or trifluoromethyl (—CF 3 ) provided that R 1  is hydrogen; 
 R 5  is hydrogen (—H), chlorine (—Cl), or fluorine (—F) atom, or group comprised of methyl (—CH 3 ), ethyl (—CH 2 CH 3 ), ethylene (—CHCH 2 ), ethyne (—CCH), n-propyl (—CH 2 CH 2 CH 3 ), iso-propyl (—CH(CH 3 ) 2 ), cyclopropyl (—CH(CH 2 ) 2 ), tert-butyl (—C(CH 3 ) 3 ), propene (—CHCHCH 3  or —CH 2 CHCH 2 ), cyclopropene (—CH(CH) 2  or —C(CH)CH 2 ), propyne (—CCCH 3  or —CH 2 CCH), hydroxyl (—OH), methylalcohol (—CH 2 OH), ethylalcohol (—CH 2 CH 2 OH or —CH(OH)CH 3 ), ethyldiol (—CH(OH)CH 2 (OH)), propanol (—CH(OH)CH 2 CH 3  or —CH 2 CH(OH)CH 3  or —CH 2 CH 2 CH 2 OH), propandiol (—CH(OH)CH(OH)CH 3  or —CH(OH)CH 2 CH 2 OH or —CH 2 CH(OH)CH 2 OH), methylether (—OCH 3 ), ethylether (—OCH 2 CH 3 ), fluoromethyl (—CH 2 F), difluoromethyl (—CHF 2 ), trifluoromethyl (—CF 3 ), fluoroethyl (—CFHCH 3  or —CH 2 CH 2 F), perfluoroethyl (—CF 2 CF 3 ), fluoropropyl (—CHFCH 2 CH 3  or —CH 2 CHFCH 3  or —CH 2 CH 2 CH 2 F), perfluoropropyl (—CF 2 CF 2 CF 3  or —CF(CF 2 ) 2 ), chloromethyl (—CH 2 Cl), dichloromethyl (—CHCl 2 ), trichloromethyl (—CCl 3 ), chloroethyl (—CClHCH 3  or —CH 2 CH 2 Cl), perchloroethyl (—CCl 2 CCl 3 ), chloropropyl (—CHClCH 2 CH 3  or —CH 2 CHClCH 3  or —CH 2 CH 2 CH 2 Cl), perchloropropyl (—CCl 2 CCl 2 CCl 3  or —CCl(CCl 2 ) 2 ), cyano (—CN), aldehyde (—C(O)H), carboxylic acid (—C(O)OH), carboxylate (—C(O)O − ), carbomethoxy (—C(O)OCH 3 ), carboethoxy (—C(O)OCH 2 CH 3 ), dimethyl amine (—N(CH 3 ) 2 ), or acid chloride (—C(O)Cl); 
 R 6  is hydrogen (—H), chlorine (—Cl), or fluorine (—F) atom, or group comprised of methyl (—CH 3 ), ethyl (—CH 2 CH 3 ), ethylene (—CHCH 2 ), ethyne (—CCH), n-propyl (—CH 2 CH 2 CH 3 ), iso-propyl (—CH(CH 3 ) 2 ), cyclopropyl (—CH(CH 2 ) 2 ), tert-butyl (—C(CH 3 ) 3 ), propene (—CHCHCH 3  or —CH 2 CHCH 2 ), cyclopropene (—CH(CH) 2  or —C(CH)CH 2 ), propyne (—CCCH 3  or —CH 2 CCH), hydroxyl (—OH), methylalcohol (—CH 2 OH), ethylalcohol (—CH 2 CH 2 OH or —CH(OH)CH 3 ), ethyldiol (—CH(OH)CH 2 (OH)), propanol (—CH(OH)CH 2 CH 3  or —CH 2 CH(OH)CH 3  or —CH 2 CH 2 CH 2 OH), propandiol (—CH(OH)CH(OH)CH 3  or —CH(OH)CH 2 CH 2 OH or —CH 2 CH(OH)CH 2 OH), methylether (—OCH 3 ), ethylether (—OCH 2 CH 3 ), fluoromethyl (—CH 2 F), difluoromethyl (—CHF 2 ), trifluoromethyl (—CF 3 ), fluoroethyl (—CFHCH 3  or —CH 2 CH 2 F), perfluoroethyl (—CF 2 CF 3 ), fluoropropyl (—CHFCH 2 CH 3  or —CH 2 CHFCH 3  or —CH 2 CH 2 CH 2 F), perfluoropropyl (—CF 2 CF 2 CF 3  or —CF(CF 2 ) 2 ), chloromethyl (—CH 2 Cl), dichloromethyl (—CHCl 2 ), trichloromethyl (—CCl 3 ), chloroethyl (—CClHCH 3  or —CH 2 CH 2 Cl), perchloroethyl (—CCl 2 CCl 3 ), chloropropyl (—CHClCH 2 CH 3  or —CH 2 CHClCH 3  or —CH 2 CH 2 CH 2 Cl), perchloropropyl (—CCl 2 CCl 2 CCl 3  or —CCl(CCl 2 ) 2 ), cyano (—CN), aldehyde (—C(O)H), carboxylic acid (—C(O)OH), carboxylate (—C(O)O − ), carbomethoxy (—C(O)OCH 3 ), carboethoxy (—C(O)OCH 2 CH 3 ), dimethyl amine (—N(CH 3 ) 2 ), or acid chloride (—C(O)Cl); 
 R 7  is hydrogen (—H), chlorine (—Cl), or fluorine (—F) atom, or group comprised of methyl (—CH 3 ), ethyl (—CH 2 CH 3 ), ethylene (—CHCH 2 ), ethyne (—CCH), n-propyl (—CH 2 CH 2 CH 3 ), iso-propyl (—CH(CH 3 ) 2 ), cyclopropyl (—CH(CH 2 ) 2 ), tert-butyl (—C(CH 3 ) 3 ), propene (—CHCHCH 3  or —CH 2 CHCH 2 ), cyclopropene (—CH(CH) 2  or —C(CH)CH 2 ), propyne (—CCCH 3  or —CH 2 CCH), hydroxyl (—OH), methylalcohol (—CH 2 OH), ethylalcohol (—CH 2 CH 2 OH or —CH(OH)CH 3 ), ethyldiol (—CH(OH)CH 2 (OH)), propanol (—CH(OH)CH 2 CH 3  or —CH 2 CH(OH)CH 3  or —CH 2 CH 2 CH 2 OH), propandiol (—CH(OH)CH(OH)CH 3  or —CH(OH)CH 2 CH 2 OH or —CH 2 CH(OH)CH 2 OH), methylether (—OCH 3 ), ethylether (—OCH 2 CH 3 ), fluoromethyl (—CH 2 F), difluoromethyl (—CHF 2 ), trifluoromethyl (—CF 3 ), fluoroethyl (—CFHCH 3  or —CH 2 CH 2 F), perfluoroethyl (—CF 2 CF 3 ), fluoropropyl (—CHFCH 2 CH 3  or —CH 2 CHFCH 3  or —CH 2 CH 2 CH 2 F), perfluoropropyl (—CF 2 CF 2 CF 3  or —CF(CF 2 ) 2 ), chloromethyl (—CH 2 Cl), dichloromethyl (—CHCl 2 ), trichloromethyl (—CCl 3 ), chloroethyl (—CClHCH 3  or —CH 2 CH 2 Cl), perchloroethyl (—CCl 2 CCl 3 ), chloropropyl (—CHClCH 2 CH 3  or —CH 2 CHClCH 3  or —CH 2 CH 2 CH 2 Cl), perchloropropyl (—CCl 2 CCl 2 CCl 3  or —CCl(CCl 2 ) 2 ), cyano (—CN), aldehyde (—C(O)H), carboxylic acid (—C(O)OH), carboxylate (—C(O)O − ), carbomethoxy (—C(O)OCH 3 ), carboethoxy (—C(O)OCH 2 CH 3 ), dimethyl amine (—N(CH 3 ) 2 ), or acid chloride (—C(O)Cl); 
 R 8  is hydrogen (—H), chlorine (—Cl), or fluorine (—F) atom, or group comprised of methyl (—CH 3 ), ethyl (—CH 2 CH 3 ), ethylene (—CHCH 2 ), ethyne (—CCH), n-propyl (—CH 2 CH 2 CH 3 ), iso-propyl (—CH(CH 3 ) 2 ), cyclopropyl (—CH(CH 2 ) 2 ), tert-butyl (—C(CH 3 ) 3 ), propene (—CHCHCH 3  or —CH 2 CHCH 2 ), cyclopropene (—CH(CH) 2  or —C(CH)CH 2 ), propyne (—CCCH 3  or —CH 2 CCH), hydroxyl (—OH), methylalcohol (—CH 2 OH), ethylalcohol (—CH 2 CH 2 OH or —CH(OH)CH 3 ), ethyldiol (—CH(OH)CH 2 (OH)), propanol (—CH(OH)CH 2 CH 3  or —CH 2 CH(OH)CH 3  or —CH 2 CH 2 CH 2 OH), propandiol (—CH(OH)CH(OH)CH 3  or —CH(OH)CH 2 CH 2 OH or —CH 2 CH(OH)CH 2 OH), methylether (—OCH 3 ), ethylether (—OCH 2 CH 3 ), fluoromethyl (—CH 2 F), difluoromethyl (—CHF 2 ), trifluoromethyl (—CF 3 ), fluoroethyl (—CFHCH 3  or —CH 2 CH 2 F), perfluoroethyl (—CF 2 CF 3 ), fluoropropyl (—CHFCH 2 CH 3  or —CH 2 CHFCH 3  or —CH 2 CH 2 CH 2 F), perfluoropropyl (—CF 2 CF 2 CF 3  or —CF(CF 2 ) 2 ), chloromethyl (—CH 2 Cl), dichloromethyl (—CHCl 2 ), trichloromethyl (—CCl 3 ), chloroethyl (—CClHCH 3  or —CH 2 CH 2 Cl), perchloroethyl (—CCl 2 CCl 3 ), chloropropyl (—CHClCH 2 CH 3  or —CH 2 CHClCH 3  or —CH 2 CH 2 CH 2 Cl), perchloropropyl (—CCl 2 CCl 2 CCl 3  or —CCl(CCl 2 ) 2 ), cyano (—CN), aldehyde (—C(O)H), carboxylic acid (—C(O)OH), carboxylate (—C(O)O − ), carbomethoxy (—C(O)OCH 3 ), carboethoxy (—C(O)OCH 2 CH 3 ), dimethyl amine (—N(CH 3 ) 2 ), or acid chloride (—C(O)Cl); 
 R 9  is hydrogen (—H), chlorine (—Cl), or fluorine (—F) atom, or group comprised of methyl (—CH 3 ), ethyl (—CH 2 CH 3 ), ethylene (—CHCH 2 ), ethyne (—CCH), n-propyl (—CH 2 CH 2 CH 3 ), iso-propyl (—CH(CH 3 ) 2 ), cyclopropyl (—CH(CH 2 ) 2 ), tert-butyl (—C(CH 3 ) 3 ), propene (—CHCHCH 3  or —CH 2 CHCH 2 ), cyclopropene (—CH(CH) 2  or —C(CH)CH 2 ), propyne (—CCCH 3  or —CH 2 CCH), hydroxyl (—OH), methylalcohol (—CH 2 OH), ethylalcohol (—CH 2 CH 2 OH or —CH(OH)CH 3 ), ethyldiol (—CH(OH)CH 2 (OH)), propanol (—CH(OH)CH 2 CH 3  or —CH 2 CH(OH)CH 3  or —CH 2 CH 2 CH 2 OH), propandiol (—CH(OH)CH(OH)CH 3  or —CH(OH)CH 2 CH 2 OH or —CH 2 CH(OH)CH 2 OH), methylether (—OCH 3 ), ethylether (—OCH 2 CH 3 ), fluoromethyl (—CH 2 F), difluoromethyl (—CHF 2 ), trifluoromethyl (—CF 3 ), fluoroethyl (—CFHCH 3  or —CH 2 CH 2 F), perfluoroethyl (—CF 2 CF 3 ), fluoropropyl (—CHFCH 2 CH 3  or —CH 2 CHFCH 3  or —CH 2 CH 2 CH 2 F), perfluoropropyl (—CF 2 CF 2 CF 3  or —CF(CF 2 ) 2 ), chloromethyl (—CH 2 Cl), dichloromethyl (—CHCl 2 ), trichloromethyl (—CCl 3 ), chloroethyl (—CClHCH 3  or —CH 2 CH 2 Cl), perchloroethyl (—CCl 2 CCl 3 ), chloropropyl (—CHClCH 2 CH 3  or —CH 2 CHClCH 3  or —CH 2 CH 2 CH 2 Cl), perchloropropyl (—CCl 2 CCl 2 CCl 3  or —CCl(CCl 2 ) 2 ), cyano (—CN), aldehyde (—C(O)H), carboxylic acid (—C(O)OH), carboxylate (—C(O)O − ), carbomethoxy (—C(O)OCH 3 ), carboethoxy (—C(O)OCH 2 CH 3 ), dimethyl amine (—N(CH 3 ) 2 ), or acid chloride (—C(O)Cl); and 
 R 10  is hydrogen (—H), chlorine (—Cl), or fluorine (—F) atom, or group comprised of methyl (—CH 3 ), ethyl (—CH 2 CH 3 ), ethylene (—CHCH 2 ), ethyne (—CCH), n-propyl (—CH 2 CH 2 CH 3 ), iso-propyl (—CH(CH 3 ) 2 ), cyclopropyl (—CH(CH 2 ) 2 ), tert-butyl (—C(CH 3 ) 3 ), propene (—CHCHCH 3  or —CH 2 CHCH 2 ), cyclopropene (—CH(CH) 2  or —C(CH)CH 2 ), propyne (—CCCH 3  or —CH 2 CCH), hydroxyl (—OH), methylalcohol (—CH 2 OH), ethylalcohol (—CH 2 CH 2 OH or —CH(OH)CH 3 ), ethyldiol (—CH(OH)CH 2 (OH)), propanol (—CH(OH)CH 2 CH 3  or —CH 2 CH(OH)CH 3  or —CH 2 CH 2 CH 2 OH), propandiol (—CH(OH)CH(OH)CH 3  or —CH(OH)CH 2 CH 2 OH or —CH 2 CH(OH)CH 2 OH), methylether (—OCH 3 ), ethylether (—OCH 2 CH 3 ), fluoromethyl (—CH 2 F), difluoromethyl (—CHF 2 ), trifluoromethyl (—CF 3 ), fluoroethyl (—CFHCH 3  or —CH 2 CH 2 F), perfluoroethyl (—CF 2 CF 3 ), fluoropropyl (—CHFCH 2 CH 3  or —CH 2 CHFCH 3  or —CH 2 CH 2 CH 2 F), perfluoropropyl (—CF 2 CF 2 CF 3  or —CF(CF 2 ) 2 ), chloromethyl (—CH 2 Cl), dichloromethyl (—CHCl 2 ), trichloromethyl (—CCl 3 ), chloroethyl (—CClHCH 3  or —CH 2 CH 2 Cl), perchloroethyl (—CCl 2 CCl 3 ), chloropropyl (—CHClCH 2 CH 3  or —CH 2 CHClCH 3  or —CH 2 CH 2 CH 2 Cl), perchloropropyl (—CCl 2 CCl 2 CCl 3  or —CCl(CCl 2 ) 2 ), cyano (—CN), aldehyde (—C(O)H), carboxylic acid (—C(O)OH), carboxylate (—C(O)O − ), carbomethoxy (—C(O)OCH 3 ), carboethoxy (—C(O)OCH 2 CH 3 ), dimethyl amine (—N(CH 3 ) 2 ), or acid chloride (—C(O)Cl). 
 
     
     
         4 . A compound of the formula: 
       
         
           
           
               
               
           
         
       
       wherein:
 R 1  is hydrogen (—H), methyl (—CH 3 ), or trifluoromethyl (—CF 3 ); 
 R 2  is hydrogen; 
 R 3  is hydrogen; 
 R 4  is hydrogen, or methyl (—CH 3 ) provided that R 1  is hydrogen, or trifluoromethyl (—CF 3 ) provided that R 1  is hydrogen; and 
 
       wherein x and w are carbon atoms in the substituent formulas A, B, or C that are bonded to the same carbon atom as R 5  and R 6 , respectively through the bonds indicated by dashed lines; 
       
         
           
           
               
               
           
         
       
       and wherein y and z are carbon atoms in the substituent formulas A′, B′, or C′ that are bonded to the same carbon atom as R 5  and R 6 , respectively through the bonds indicated by dashed lines; 
       
         
           
           
               
               
           
         
       
       And wherein; 
       R 5 , R 6 , R 7 , R 8 , R 9 , R 10 , R 5 ′, R 6 ′, R 7 ′, R 8 ′, R 9 ′, and R 10 ′ may independently be hydrogen (—H), chlorine (—Cl), or fluorine (—F) atom, or group comprised of methyl (—CH 3 ), ethyl (—CH 2 CH 3 ), ethylene (—CHCH 2 ), ethyne (—CCH), n-propyl (—CH 2 CH 2 CH 3 ), iso-propyl (—CH(CH 3 ) 2 ), cyclopropyl (—CH(CH 2 ) 2 ), tert-butyl (—C(CH 3 ) 3 ), propene (—CHCHCH 3  or —CH 2 CHCH 2 ), cyclopropene (—CH(CH) 2  or —C(CH)CH 2 ), propyne (—CCCH 3  or —CH 2 CCH), hydroxyl (—OH), methylalcohol (—CH 2 OH), ethylalcohol (—CH 2 CH 2 OH or —CH(OH)CH 3 ), ethyldiol (—CH(OH)CH 2 (OH)), propanol (—CH(OH)CH 2 CH 3  or —CH 2 CH(OH)CH 3  or —CH 2 CH 2 CH 2 OH), propandiol (—CH(OH)CH(OH)CH 3  or —CH(OH)CH 2 CH 2 OH or —CH 2 CH(OH)CH 2 OH), methylether (—OCH 3 ), ethylether (—OCH 2 CH 3 ), fluoromethyl (—CH 2 F), difluoromethyl (—CHF 2 ), trifluoromethyl (—CF 3 ), fluoroethyl (—CFHCH 3  or —CH 2 CH 2 F), perfluoroethyl (—CF 2 CF 3 ), fluoropropyl (—CHFCH 2 CH 3  or —CH 2 CHFCH 3  or —CH 2 CH 2 CH 2 F), perfluoropropyl (—CF 2 CF 2 CF 3  or —CF(CF 2 ) 2 ), chloromethyl (—CH 2 Cl), dichloromethyl (—CHCl 2 ), trichloromethyl (—CCl 3 ), chloroethyl (—CClHCH 3  or —CH 2 CH 2 Cl), perchloroethyl (—CCl 2 CCl 3 ), chloropropyl (—CHClCH 2 CH 3  or —CH 2 CHClCH 3  or —CH 2 CH 2 CH 2 Cl), perchloropropyl (—CCl 2 CCl 2 CCl 3  or —CCl(CCl 2 ) 2 ), cyano (—CN), aldehyde (—C(O)H), carboxylic acid (—C(O)OH), carboxylate (—C(O)O − ), carbomethoxy (—C(O)OCH 3 ), carboethoxy (—C(O)OCH 2 CH 3 ), dimethyl amine (—N(CH 3 ) 2 ), or acid chloride (—C(O)Cl). 
     
     
         5 . A method of inhibiting the ethylene response in a plant, said method comprising:
 a. A compound that upon exposure to light releases 1-methylcyclopropene or a chemical analogue of 1-methylcyclopropene and at least one additional linked molecule; and   b. exposure of said compound to light in the presence of said plant.   
     
     
         6 . The method of inhibiting the ethylene response in a plant of  claim 5  wherein said compound is a chemical analogue of 2(5H)-furanone. 
     
     
         7 . The method of inhibiting the ethylene response in a plant of  claim 5  wherein said compound is a methyl-2(5H)-furanone or a trifluoromethyl-2(5H)-furanone. 
     
     
         8 . The method of inhibiting the ethylene response in a plant of  claim 5  wherein said compound is a chemical analogue of 2(3H)-furanone. 
     
     
         9 . The method of inhibiting the ethylene response in a plant of  claim 5  wherein said compound is a methyl-2(3H)-furanone or a trifluoromethyl-2(3H)-furanone. 
     
     
         10 . The method of inhibiting the ethylene response in a plant of  claim 5  wherein said compound is a chemical analogue of 3-oxabicyclo[3.1.0]hexa-2,4-dione. 
     
     
         11 . The method of inhibiting the ethylene response in a plant of  claim 5  wherein said compound is 1-methyl-3-oxabicyclo[3.1.0]hexa-2,4-dione or 1-trifluoromethyl-3-oxabicyclo[3.1.0]hexa-2,4-dione. 
     
     
         12 . The method of inhibiting the ethylene response in a plant of  claim 5  wherein said compound is 2-oxa-1-methyl-bicyclo[2.1.0]penta-3-one, 3-oxa-1-methyl-bicyclo[2.1.0]penta-2-one, 2-oxa-1-trifluoromethyl-bicyclo[2.1.0]penta-3-one, or 3-oxa-1-trifluoromethyl-bicyclo[2.1.0]penta-2-one. 
     
     
         13 . The method inhibiting the ethylene response in a plant of  claim 5  wherein said compound is a chemical analogue of 3,4-dioxa-bicyclo[4.1.0]hepta-2,5-dione. 
     
     
         14 . The method of inhibiting the ethylene response in a plant of  claim 5  wherein said compound is 3,4-dioxa-1-methyl-bicyclo[4.1.0]hepta-2,5-dione or 3,4-dioxa-1-trifluoromethyl-bicyclo[4.1.0]hepta-2,5-dione. 
     
     
         15 . The method of inhibiting the ethylene response in a plant of  claim 5  wherein said compound is a chemical analogue of tetracyclo[5.2.1.0 2,6 .0 3,5 ]deca-8-en-10-one. 
     
     
         16 . The method of inhibiting the ethylene response in a plant of  claim 5  wherein said compound is 2-carbomethoxy-3-methyl-tetracyclo[5.2.1.0 2,6 .0 3,5 ]deca-8-en-10-one; 2-carbomethoxy-3-trifluoromethyl-tetracyclo[5.2.1.0 2,6 .0 3,5 ]deca-8-en-10-one; 2-carbomethoxy-5-methyl-tetracyclo[5.2.1.0 2,6 .0 3,5 ]deca-8-en-10-one; 2-carbomethoxy-5-trifluoromethyl-tetracyclo[5.2.1.0 2,6 .0 3,5 ]deca-8-en-10-one; 2,6-dicarbomethoxy-3-trifluoromethyl-tetracyclo[5.2.1.0 2,6 .0 3,5 ]deca-8-en-10-one; or 2,6-dicarbomethoxy-3-methyl-tetracyclo[5.2.1.0 2,6 .0 3,5 ]deca-8-en-10-one. 
     
     
         17 . The method of inhibiting the ethylene response in a plant of  claim 15  wherein at least one said additional linked molecule released upon the exposure of said compound to light is a fertilizer, pesticide, herbicide, fungicide, preservative, bee attractant or insect repellent. 
     
     
         18 . The method of inhibiting the ethylene response in a plant of  claim 5  wherein said compound is a chemical analogue of tricyclo[3.2.2.0 2,4 ]nona-6,8-diene. 
     
     
         19 . The method of inhibiting the ethylene response in a plant of  claim 5  wherein said compound is 1-carbomethoxy-2-methyl-tricyclo[3.2.2.0 2,4 ]nona-6,8-diene; 1-carbomethoxy-4-methyl-tricyclo[3.2.2.0 2,4 ]nona-6,8-diene; 1-carbomethoxy-4-trifluoromethyl-tricyclo[3.2.2.0 2,4 ]nona-6,8-diene; 1,5-dicarbomethoxy-2-methyl-tricyclo[3.2.2.0 2,4 ]nona-6,8-diene; 1,5-dicarbomethoxy-2-trifluoromethyl-tricyclo[3.2.2.0 2,4 ]nona-6,8-diene; or 1-carbomethoxy-2-trifluoromethyl-tricyclo[3.2.2.0 2,4 ]nona-6,8-diene. 
     
     
         20 . The method of inhibiting the ethylene response in a plant of  claim 18  wherein at least one said additional linked molecule released upon the exposure of said compound to light is a fertilizer, pesticide, herbicide, fungicide, preservative, bee attractant or insect repellent. 
     
     
         21 . A method of inhibiting the ethylene response in a plant, said method comprising:
 a. A compound that upon exposure to heat releases 1-methylcyclopropene or a chemical analogue of 1-methylcyclopropene and at least one additional linked molecule; and   b. exposure of said compound to heat in the presence of said plant.   
     
     
         22 . The method of inhibiting the ethylene response in a plant of  claim 21  wherein said compound is a chemical analogue of 3,4-dioxa-bicyclo[4.1.0]hepta-2,5-dione. 
     
     
         23 . The method of inhibiting the ethylene response in a plant of  claim 21  wherein said compound is 1-methyl-3,4-dioxa-bicyclo[4.1.0]hepta-2,5-dione or 1-trifluoromethyl-bicyclo[4.1.0]hepta-2,5-dione. 
     
     
         24 . The method of inhibiting the ethylene response in a plant of  claim 21  wherein said compound is a chemical analogue of tetracyclo[5.2.1.0 2,6 .0 3,5 ]deca-8-en-10-one. 
     
     
         25 . The method of inhibiting the ethylene response in a plant of  claim 21  wherein said compound is 2-carbomethoxy-3-methyl-tetracyclo[5.2.1.0 2,6 .0 3,5 ]deca-8-en-10-one; 2-carbomethoxy-3-trifluoromethyl-tetracyclo[5.2.1.0 2,6 .0 3,5 ]deca-8-en-10-one; 2-carbomethoxy-5-methyl-tetracyclo[5.2.1.0 2,6 .0 3,5 ]deca-8-en-10-one; 2-carbomethoxy-5-trifluoromethyl-tetracyclo[5.2.1.0 2,6 .0 3,5 ]deca-8-en-10-one; 2,6-dicarbomethoxy-3-trifluoromethyl-tetracyclo[5.2.1.0 2,6 .0 3,5 ]deca-8-en-10-one; or 2,6-dicarbomethoxy-3-methyl-tetracyclo[5.2.1.0 2,6 .0 3,5 ]deca-8-en-10-one. 
     
     
         26 . The method of inhibiting the ethylene response in a plant of  claim 24  wherein at least one said additional linked molecule released upon the exposure of said compound to light is a fertilizer, pesticide, herbicide, fungicide, preservative, bee attractant or insect repellent. 
     
     
         27 . The method of inhibiting the ethylene response in a plant of  claim 21  wherein said compound is a chemical analogue of tricyclo[3.2.2.0 2,4 ]nona-6,8-diene. 
     
     
         28 . The method of inhibiting the ethylene response in a plant of  claim 21  wherein said compound is 1-carbomethoxy-2-methyl-tricyclo[3.2.2.0 2,4 ]nona-6,8-diene; 1-carbomethoxy-4-methyl-tricyclo[3.2.2.0 2,4 ]nona-6,8-diene; 1-carbomethoxy-4-trifluoromethyl-tricyclo[3.2.2.0 2,4 ]nona-6,8-diene; 1,5-dicarbomethoxy-2-methyl-tricyclo[3.2.2.0 2,4 ]nona-6,8-diene; 1,5-dicarbomethoxy-2-trifluoromethyl-tricyclo[3.2.2.0 2,4 ]nona-6,8-diene; or 1-carbomethoxy-2-trifluoromethyl-tricyclo[3.2.2.0 2,4 ]nona-6,8-diene. 
     
     
         29 . The method of inhibiting the ethylene response in a plant of  claim 27  wherein at least one said additional linked molecule released upon the exposure of said compound to light is a fertilizer, pesticide, herbicide, fungicide, preservative, bee attractant or insect repellent. 
     
     
         30 . The method of inhibiting the ethylene response in a plant of  claim 5  wherein said compound is additionally exposed to an acidic aqueous solution. 
     
     
         31 . The method of inhibiting the ethylene response in a plant of  claim 30  wherein said compound is a analogue of 2-oxa-bicyclo[2.1.0]penta-3-one ketal. 
     
     
         32 . The method of inhibiting the ethylene response in a plant of  claim 30  wherein said compound is 1-methyl-2-oxa-bicyclo[2.1.0]penta-3-one ketal; 4-methyl-2-oxa-bicyclo[4.1.0]penta-3-one ketal; 1-trifluoromethyl-2-oxa-bicyclo[2.1.0]penta-3-one ketal; or 4-trifluoromethyl-2-oxa-bicyclo[2.1.0]penta-3-one ketal.

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