? ELECTROLYSIS AND ELECTROSYNTHESIS 



were used there was formed a substance containing 

 nitrogen and sulphur, the chemical nature of which 

 has not yet been determined. 



Nitro-piperidines on electrolytical reduction give 

 piperylhydrazines, ammonia is split off, and piper- 

 idine is in part regenerated. 



Nitroso-a-pipecoline gives, in addition to ammonia, 

 <*-pipecoline and a-methyl-piperylhydrazine. 



In a like manner from nitroso-aldehyde-copellidine 

 (CH 3 .C 2 H B .C 6 H 8 : N.NO) there is formed ammonia, a 

 large proportion of copellidine (CH 3 .C a H B .C 5 H 8 : NH), 

 and also the corresponding methyl-ethyl-piperylhy- 

 drazine: 



CH 3 .C a H 5 .C 6 H 8 :N.NH a . 



Quinoline in 10$ sulphuric-acid solution gave a 

 polymeric dihydro-quinoline and tetrahydro-quinoline 

 (Ahrens '). 



Quinaldine, likewise in sulphuric-acid solution, gave 

 dihydroquinaldine and tetrahydro-quinaldine. 



6. Electrolytic Oxidation of Nitro-compounds. 



The influence which the nitroso- and nitro-groups 

 exert on the other substituents is especially shown in 

 oxidation reactions, which here occur much more 

 readily than in the case of compounds which have not 



1 Chem. Ber., 29, 1123. 



