72 ELECTROLYSIS AND ELECTROS YNTHESIS 



is formed from m-nitro-acetophenone ; amido-oxy-ben 

 zophenone, 



from m-nitro-benzophenone ; and amido-oxy-phenyl-p- 

 tolylketone, 



from m-nitro-phenyl-p-tolylketone. 



The process which Straub ' employs to prepare 

 hydrazo-compounds from nitro-hydrocarbons is yet to 

 be mentioned. The chief feature of his experiments 

 is that the original material and all intermediate 

 products are retained in solution during the electroly- 

 sis by the selection of a suitable solvent, and the 

 hydrazo-compounds are withdrawn from the action of 

 the current by precipitation. 



Straub attains this end by subjecting the nitro- 

 hydrocarbons to electrolytic reduction in a solvent 

 made a conductor by the addition of potassium hy- 

 droxide. The quantity of the liquid used must be 

 sufficient to keep in solution the azo- and azoxy-com- 

 pounds corresponding to the nitro-hydrocarbon. 



Noyes and Dorrance 3 have applied Gattermann's 

 reaction to p-nitraniline and some other substances. 

 In this way they obtained p-diamido-benzene sulphate 



1 German Patent, 79731. 

 8 Chem. Ber., 28, 2349. 



