OP ARTS AND SCIENCES. 139 



oil becomes colored pale greenish yellow. As regards smell and 

 physiological action, it closely resembles phenylisocyanide. It is 

 far more stable, however, than the lower homologue, and shows 

 little tendency to polymerize, even at 180°, and can therefore be 

 kept a long time without much change, except that the color changes 

 to dark yellow. The substance is readily volatile with steam. 



0.1454 gram substance gave 0.4370 gram C0 2 and 0.0807 gram 



H 2 G. 

 0.2499 gram substance gave 26.5 c.c. moist nitrogen at 22° and 



75G mm. 



Theory for C 8 H 7 N. Found. 



C 82.05 81.97 



H 5.98 6.17 



N 11.97 11.95 



Behavior towards Organic Acids. — On pouring 18 grams o-to- 

 ljlisocyanide into 2 molecules pure formic acid, cooled to 0°, a vio- 

 lent reaction sets in with evolution of pure carbonic oxide. The 

 residue consists of form-o-toluide, which boils at 286°, and crys- 

 tallizes from a mixture of ligroine and ether in six and eight sided 

 leaflets, melting at 62°. It is identical in every respect with a 

 form-o-toluide obtained directly from o-toluidine and formic acid 

 according to Ladenburg's direction.* 



0.1744 gram substance gave 0.4567 gram C0 2 and 0.1060 gram 



H 2 0. 

 0.2044 gram substance gave 18.2 c.c. moist nitrogen at 15° and 



752 mm. 



Theory for CgHgNO. Found. 



C 71.11 71.41 



H 6.66 6.75 



N 10.37 10.32 



On mixing o-tolylisocyanide with 2 molecules of acetic acid 

 reaction sets in on warming gently : there is formed, after distil- 

 ling under reduced pressure, acetic anhydride and a mixture of 

 form-o-toluide and acet-o-toluide f (mpt. 10S°). Towards anhy- 

 drous oxalic acid o-tolylisocyanide behaves exactly like phenyliso- 

 cyanide. On heating o-tolylisocyanide with benzoic acid reaction 



* Ber. d. chem. Ges., X. 1129. He gives the melting point, 56.°5-57.°5. 

 t Lehmann, Jahresber. 1882, p. 369. Beilstein, Kuhlberg, Ann. Chem. (Lie- 

 big), CLVI. 77. 



