2-Chloroethane-(thiono)-phosphonic acid esters

Abstract

Novel 2-chloroethanephosphonic acid and 2-chloroethanethionophosphonici acid derivatives of the formula ##EQU1## wherein X is oxygen 2-chloroethanethionophosphonic sulfur; and R is aryloxy, optionally substituted with hydroxy, alkyl, halogen, or nitro, or monoarylamino, or monoalkylamino of from 1 to 6 carbon atoms; exhibit marked plant growth influencing properties, e.g. inhibition or stimulation or alteration of plant growth.

What is claimed is: 
     
       1. .[.2-Chloroethanephosphonic acid and.]. 2-Chloroethanethionophosphonic acid compound of the general formula ##EQU21## in which X is .[.oxygen or.]. sulfur, R is unsubstituted aryloxy or substituted aryloxy .[.or.]. substituted with alkyl, hydroxy or nitro.   
     
     
       2. Compound as claimed in claim 1 wherein R is phenyloxy or substituted phenyloxy substituted with methyl, hydroxy, or nitro. 
     
     
       3. Compound as claimed in claim 1 designated as 2-chloroethanethionophosphonic acid phenyl ester chloride.  .[.4. Compound as claimed in claim 1 designated as 2-chloroethanephosphonic acid phenyl 
     
     
        ester chloride..]. 5. Compound as claimed in claim 1 designated as 2-chloroethanethionophosphonic acid 4'-methylphenyl ester chloride.