Theory. 





I. 



Experiment. 



n. IE 



C 1S 67.20 



. ... 



66.82 



— - 



H 22 9.65 



..... 



9.72 



— - 



N 7.47 



.... 



— 



7.61 



CI 15.68 



.... 



— 



— 15 



Synthesis of Amido-benzene. 303 



needles. These are not soluble in cold water to any appre- 

 ciable extent, very slightly soluble in boiling water, but 

 easily soluble in alcohol. After one or two recrystalliza- 

 tions, this salt was obtained in a state of purity, and proved 

 to be the hydx-ochlorate of trimethyl diethyl amido-benzene : 



C 6 (CH 3 ) 3 (C 2 H 5 ) 2 NH 2) HC1, 



which requires the following values — 



IV. 



15.57 



The free trimethyl diethyl amido-benzene obtained from 

 this salt by addition of an alkali, is a liquid boiling between 

 288° and 290°. It bas a specific gravity of .971, and is quite 

 colorless when first set free, but darkens and becomes too 

 thick to pour on standing exposed. The hydrochlorate does 

 not yield a well crystallized double platinum salt, but with 

 palladium chloride it forms a beautiful green double salt in 

 feathery crystals. 



The acetate and sulphate crystallize in needles, and are 

 very soluble. The oxalate is very difficultly soluble, and 

 crystallizes in prisms. 



The Acetyl compound, C 6 (CH 3 ) 3 (C 2 H 5 ) 2 NH (C 2 H 3 O), is 

 easily obtained by the action of acetic anhydride ; it crys- 

 tallizes in rosettes of needles, and melts at 182°. 



The Isonitril, C 6 (CH 3 ) 3 (C 2 H 5 ) 2 NC is best prepared by 

 mixing the base with an alcoholic solution of caustic potash 

 and chloroform in a small flask fitted with a reversed con- 

 denser. A violent re-action ensues, and the pungent isoni- 

 tril odour is quite marked, thus proving the primary 

 character of the base. After neutralizing the excess of 

 base present with sulphuric acid, the isonitril is extracted 

 with ether, which extract yields on evaporation a thick oil 

 which soon crystallises in short prisms, melting between 

 190 and 192°. 



