54 ELECTROLYSIS AND ELECTROSYNTHESIS 



2. Aldehydes and Ketones. 



Benzaldehyde. Kauffmann, 1 by the electrolysis of 

 benzaldehyde in a 12-15$ solution of potassium bi- 

 sulphide, obtained at the cathode a mixture of hy- 

 dro-benzoin and iso-hydrobenzoin. According to his 

 statements, 2 an alcoholic solution of sodium hydroxide 

 is more suitable for the reaction than the aqueous 

 solution of bisulphide. Other aldehydes and ketones 

 show a behavior similar to benzaldehyde. 



Tetramethyl-diamido-benzophenone. Michler's ke- 

 tone, 



/C 6 H 4 N : (CH 3 ) 9 

 J \C 6 H 4 N : (CH,y 



gives the corresponding benzhydrol, 



/C 6 H 4 .N : (CH.). 

 (HO)CH 



\C.H 4 .N :(CH,) a 



Aceto - phenone, C 6 H 6 .CO.CH S . Aceto - phenone 

 yields aceto-phenone pinacone, 



C.H ^-C 



\C(OH).C(OH). 



Ztschr. f. Elektroch., 2, 365. 

 4, 461. 



