272 PROCEEDINGS OF THE AMERICAN ACADEMY. 



different specimens is no more than would be expected, when it is remem- 

 bered that the product was purified only by washing with benzol. 



Properties of the Addition Product of Trinitranisol and Sodic Acetacetic 

 Ester, C6H2(N02)30CH3(CH3COCHNaCOOC2H5)3. 



This substance forms a deep crimson powder, which we have not suc- 

 ceeded in bringing into a crystalline state. It is decidedly stable for a 

 body of this class, keeping for even several days in a desiccator, but 

 finally decomposing into a black tar. When heated it is slightly explo- 

 sive. It dissolves completely in water without decomposition, to judge 

 from the color ; is soluble in common alcohol, but gives a turbid solu- 

 tion ; on the other hand, it dissolves, forming a clear solution, in methyl 

 alcohol; soluble in acetone; insoluble in benzol, ether, chloroform, car- 

 bonic disulphide, or ligroin. Acids decompose it instantly, as was shown 

 by the destruction of the color. 



Action of Sodic Malonic Ester on Trinitranisol. 



Two jrrams of trinitranisol dissolved in absolute benzol were mixed 

 with a benzol solution of 4.5 grams of sodic malonic ester prepared by 

 the direct action of sodium on the malonic ester, — that is, three mole- 

 cules of the sodium ester to each molecule of trinitranisol. As the two 

 solutions came together, an intense cherry red color appeared, with the 

 formation of a thick gelatinous precipitate of the same color, which 

 increased in volume and deepened in color as the reaction continued. 

 After the mixture had stood some time at ordinary temperatures, a large 

 enough quantity of benzol was added to produce complete precipitation, 

 the product was then filtered rapidly, washed with benzol till the filtrate 

 was colorless, pressed quickly on the porous plate, and dried in vacuo. 

 This reaction seemed to run more quickly and cleanly than the corre- 

 sponding one with sodic acetacetic ester, giving a purer product which 

 was very easily handled and washed. 



I. 0.2028 gram of the substance gave 0.0.536 gram of sodic sulphate. 

 II. 0.3027 gram of the substance gave 0.0796 gram of sodic sulphate. 



Caloulatpfl for Found. 



CeH2(NO2)30CH,,[CUN'a(C00C2H5)2]3 I. II. 



Sodium 8.74 " 8.56 8.52 



