Boron chelate complexes

Abstract

Boron chelate complexes of the general formula are described, where X is either —C(R 1 R 2 )— or —C(R 1 R 2 )—C(═O)—, in which R 1 , R 2 independently of one another denote H, alkyl (with 1 to 5 C atoms), aryl, silyl or a polymer, and one of the alkyl radicals R 1 or R 2 may be bonded to a further chelatoborate radical, or X denotes 1,2-aryl with up to two substituents S in the positions 3 to 6 in which S 1 , S 2 independently of one another denote alkyl (with 1 to 5 C atoms), fluorine or a polymer, as well as M + denotes Li + , Na + , K + , Rb + , Cs + or [(R 3 R 4 R 5 R 6 )N] + or H + , where R 3 , R 4 , R 5 , R 6 independently of one another denote H or alkyl with preferably 1 to 4 C atoms.

1 . Boron chelate complexes of the general formula  
       
         
           
           
               
               
           
         
       
       where 
 X is either —C(R 1 R 2 )— or —C(R 1 R 2 )—C(═O)—, in which 
 R 1 , R 2  independently of one another denote H, alkyl (with 1 to 5 C atoms), aryl, silyl or a polymer, and one of the alkyl radicals R 1  or R 2  may be bonded to a further chelatoborate radical,  
 or X denotes 1,2-aryl with up to two substituents S in the positions 3 to 6  
                     
 in which S 1 , S 2  independently of one another denote alkyl (with 1 to 5 C atoms), fluorine or a polymer, as well as M+ denotes Li + , Na + , K + , Rb + , Cs +  or [(R 3 R 4 R 5 R 6 )N] +  or H + ,  
 where R 3 , R 4 , R 5 , R 6  independently of one another denote H or alkyl.  
 
 
     
     
         2 . Boron chelate complex according to  claim 1 , characterised in that the boron chelate complex is hydrogen-(malonato,oxalato) borate, hydrogen-(glycolato,oxalato)borate, hydrogen-(lactato,oxalato)borate, hydrogen-(oxalato,salicylato)borate, bis-[hydrogen-(oxalato,tartrato)borate, or a lithium, caesium or tetraalkylammonium salt of the aforementioned compounds.  
     
     
         3 . Method for the production of hydrogen boron chelate complexes according to one of claims  1  or  2 , characterised in that boric acid or a boron oxide is reacted with oxalic acid and a chelate-forming agent H—O—X—(CO)—O—H.  
     
     
         4 . Method for the production of alkali metal boron chelate complex salts or ammonium boron chelate complex salts according to one of claims  1  or  2 , characterised in that boric acid or a boron oxide is reacted with oxalic acid, a chelate-forming agent H—O—X—(CO)—O—H and an oxidic alkali metal source or an ammonium salt.  
     
     
         5 . Use of the hydrogen boron chelate complexes according to one of claims  1  or  2  as super acid catalysts in organic syntheses.  
     
     
         6 . Use of the lithium boron chelate complexe salts according to one of claims  1  or  2  as an electrolyte in electrolytic cells.  
     
     
         7 . Use of the lithium boron chelate complexe salts according to one of claims  1  or  2  as an electrolyte in lithium batteries.  
     
     
         8 . Use of the ammonium and caesium boron chelate complex salts according to one of claims  1  or  2  in electrolytic double-layer capacitors.