328 PROCEEDINGS OF THE AMERICAN ACADEMY 



For analysis the precipitated salt was well washed, recrystallized 

 from hot water, and dried in vacuo over sulphuric acid. It is spar- 

 ingly soluble even in hot water, and separates from a hot concentrated 

 solution in irregularly branching flattened needles. 



I. 0.4843 grm. substance gave 0.2730 grm. AgCl. 

 II. 0.3948 grm. substance gave 0.2220 grm. AgCl. 



Calculated for Found. 



AgC 3 H 2 C10 3 . I. II. 



Ag 42.60 42.44 42.34 



Ethyl 8 C/tlorpyromucate, C 5 H 2 C10 3 C 2 H 5 . — The ethyl ether was pre- 

 pared by heating at 100° a solution of 5 parts of 8 chlorpyromucic 

 acid in 10 parts of absolute alcohol, with the addition of 5 parts of 

 concentrated sulphuric acid (Sp. Gr. 1.84). 



After heating for three hours, the ether was precipitated by the 

 addition of water, washed first with dilute sodic carbonate, then with 

 water, and finally dried with calcic chloride. The ether is a colorless 

 heavy oil boiling at 216-218° (column completely in vapor) under a 

 pressure of 76.8 mm., solidifying at 1-2°, and melting at the same 

 point. 



I. 0.2740 grm. substance gave 0.2219 grm. AgCl. 

 II. 0.2918 grm. substance gave 0.2402 grm. AgCl. 



Calculated for Found. 



C 6 H 2 C10 3 C 2 H 5 . I. II. 



CI 20.34 20.02 20.35 



8 Chlorpyromucamide, C 5 H 2 C10.,NH 2 . — 8 chlorpyromucic ether is 

 but slowly attacked by concentrated ammonia in the cold, and the 

 amide may more readily be prepared from the acid chloride by means 

 of solid ammonic carbonate. The amide is readily soluble in hot water, 

 sparingly soluble in cold water and separates from a hot concentrated 

 solution in fine branching needles, which melt at 154-155°. 



For analysis, the amide was dried over sulphuric acid. 



I. 0.1696 grm. substance gave 0.1677 grm. AgCl. 

 II. 0.2933 grm. substance gave 25.7 c.c. moist N at 25° and under 

 a pressure of 764 mm. 



Found. 



II. 



9.82 



Preparation I. was made from the ether, and II. from the acid 

 chloride. 



