SAWYER. — MUCOPHENOXYCHLORIC ACID. 249 



Phenoxychlormaleic Anhydride, C 4 (OC II 5 )ClO 3 . 



This substance, purified by sublimation, was analyzed with the 

 following results : — 



I. 0.2000 gram substance gave 0.0441 gram H 2 0, and 0.3929 gram 



( O,. 



II. 0.1054 gram substance gave 0.0664 gram AgCl. 



Calculated for Found. 



C^OCeHgJClO* I. II- 



Carbon 53.45 53.56 



Hydrogen 2.23 2.45 



Chlorine 15.81 15.60 



It melts sharply at 97°, sublimes in thin curving plates, and dissolves 

 readily in water, alcohol, ether, chloroform, and benzol, but only spar- 

 ingly in ligroin and carbonic disulphide. 



Baric Phenoxychlormaleate, BaC 4 (OC 6 H 5 )C10 4 . 4 H 2 0. 



This salt is most advantageously obtained in the following manner. 

 Baric hydrate is added to a solution of the acid ammonium salt, pre- 

 pared by boiling a solution of mucophenoxychloroxiine, until the re- 

 action is faintly alkaline. Baric bromide is then added in sufficient 

 quantity to replace all the ammonium by barium, and on the addition 

 of alcohol the new salt is precipitated in nodular aggregations of 

 needles. It is filtered off, pressed dry, and redissolved in water, 

 from which it is redeposited, on spontaneous evaporation, in bundles 

 of long silky needles. When dried for analysis by pressure between 

 filter papers, its weight remains constant in the air ; but over sulphuric 

 acid it suffers a loss corresponding to more than three molecules of 

 crystal water, and at 110° there is a further loss, equivalent to the 

 remainder of a fourth molecule. 



I. 0.6161 gram air-dried salt lost over H 2 S0 4 , 0.0871 gram, and 

 in addition at 110°, 0.0090 gram H 2 0. 



II. 0.1830 gram air-dried salt gave 0.0960 gram BaS0 4 . 



III. 0.1918 gram air-dried salt gave 0.1004 gram BaS0 4 . 



Caleulated for Found 



BaC 4 (OC, ; lI.-,)U10 4 .4H 2 0. I. II. III. 



Water 16.02 15.60 



Barium 30.50 30.84 30.77 



0.2060 gram salt, dry at 110°, gave 0.1273 gram BaS0 4 . 



Calculated for 

 BaC 4 (OC 6 H 5 )C10 4 . Found. 



Barium 36.29 36.33 



