OP ARTS AND SCIENCES. 143 



NHC 6 H 4 CH 3 

 CH 3 C 6 H 4 N=C( 



N NHC 6 H 4 CH 3 



melting point, 131°.* 



Lachniann f has described a substance as isocyan-o-tolylchloride, 

 wbicli he obtained by treating o-tolylmustard oil with chlorine, 

 according to the directions of Sell and Zierold. He studied it 

 but little, and gives the boiling point 218°, whereas the above 

 product boils at 214°-215°. That Lachmann's product was not 

 a homogeneous substance follows from the facts given above under 

 isocyanphenylchloride (p. 115). 



Mesox-o-toluidehydrate = Dioxymalonic-o-toluide, 



CH 3 C 6 H 4 -N-C° H 



)C(OH) 2 . 

 CH 3 -C 6 H 4 -!N"=Cqjj 



Phosgene reacts on o-tolylisocyanide energetically below 0°. 

 The union of these substances was accomplished as above in the 

 case of phenylisocyanide. In this instance, however, no attempt 

 was made to purify the resulting yellow imidechloride, 



CHAH^C*? 1 



;co, 



CH 3 C 6 H 4 N=C/-,| 



by distillation. The crude product, after the excess of phosgene 

 had been removed by heating on a water bath, was directly poured 

 into a large amount of water : in* a short time, the imidechloride 

 is converted into mesox-o-toluidehydrate and hydrochloric acid, 

 with marked evolution of heat. The crude solid mass was first 

 recrystallized from benzine, and then dissolved in sodic hydrate, 

 precipitated again by acids, and finally recrystallized from much 

 hot water. 



0.1530 gram substance, dried over H 2 S0 4 in vacuum, gave 0.3641 



gram C0 2 and 0.0812 gram H 2 0. 

 0.1920 gram substance gave 14.6 c.c. moist nitrogen at 16° and 



762 mm. 



* Berger, Ber. d. chem. Ges., XII. 1857. 



t Ber. d. chem. Ges., XII. 1349. He does not state whether an analysis of 

 the product obtained was carried out. 



