334 PROCEEDINGS OF THE AMEEICAN ACADEMY 



out decomposition at 119-120*^ under a pressure of 748 mm.* Analy- 

 sis showed it to be dibromchlormethau. 



I. 0,1545 grm. substance gave 0.3855 grm. AgCl -\- AgBr. 

 IL 0.1418 grm. substance gave 0.353 G grm. AgCl -\- AgBr. 



Cl + Br 



The weight of dibromchlormethan thus obtained was about sixty 

 per cent of the theoretical amount. 



The residue left after distillation was acidified, and acfain distilled 

 with steam. The acid distillate thus obtained was neutralized with 

 plumbic carbonate, and yielded upon evaporation plumbic formiate. 



0.3936 grm. of the salt dried at 100° gave 0.4003 grm. PbSO^. 



Calculated for Pb . (CH02)2. Found. 



Pb 69.69 " 69.47 



The decomposition of mucoxychloric acid by aqueous bromine may 

 therefore be expressed by the equation, 



C.HgClO, + 2 Br^ + HP = H,C,0, + CClBr^CHO + 2 HBr. 



Anilmucoxychloric Acid. 



Mucoxychloric acid, like mucoxybromic acid, readily gives with 

 phenylhydrazine a condensation product. It has, however, little 

 stability, and we have therefore not studied it more closely. With 

 aniline, however, it gives even in dilute acid solutions a beautifully 

 crystalline product. For its preparation we added one molecule of 

 aniline hydrochlorate to a solution of the barium salt in a slight 

 excess of dilute hydrochloric acid. The solution soon turned yellow, 

 and after standing for a short time solidified with the sejjaration of 

 pale yellow finely felted needles. At low temperatures the crys- 

 tals formed were often nearly colorless. When recrystallized from 

 hot water, and dried over sulphuric acid, the substance was shown 

 by analysis to be anilmucoxychloric acid formed according to the 

 equation, 



C.HgClO, + C,H,NH, = C,H3C103 . NC,H, + H.O. 



* According to O. Jacobsen and K. Neumeister (Ber. d. deutsch. chem. 

 Gesellscli., xv. 601), chlorobromoform boils between 123 and 125", with slight 

 decomposition. 



