38 ELECTROLYSIS AND ELECTROSYNTHESIS 



would be split off and esters of higher dibasic acids 

 would be formed according to the equations 



2C,H 6 .OOC - CH a - COOK 



=C 2 H 6 .OOC-CH a -CH a -COOC 2 H B +2K a +C0 2 , 

 2C 2 H 6 - OOC.CH 3 .CH 2 .COOK 



=C a H 6 .OOC.CH 2 .CH a .CH 2 .CH a .COOC a H 6 



Their experiments, conducted in fairly concentrated 

 solutions with currents of high density, completely 

 confirmed this supposition. Under these conditions 

 the following syntheses were made: 



I . Succinic acid from ethyl-potassium malonate. 



2. Adipic acid from ethyl-potassium succinate. 



3. Suberic acid from ethyl-potassium glutarate. 



4. Sebacic acid from the ethyl-potassium salt of 

 adipic acid. 



5. n-Dodecane-dicarboxylic acid from the ethyl- 

 potassium salt of suberic acid. 



6. n-Deca-hexane-dicarboxylic acid from the ethyl- 

 potassium salt of sebacic acid. 



If the ethyl-potassium salts of substituted acids are 

 taken as a starting-point it is possible to obtain 

 disubstituted acids according to the above reaction. 



1. Ethyl-potassium methyl-malonate gave the two 

 symmetrical dimethyl-succinic acids, having the melt- 

 ing-points 193 and 121. 



2. Ethyl-pctassium ethyl-malonate gave the corre- 



