190 Proceedings of the Royal Irish Academy. 



was obtained by taking one molecular proportion of trinitrotoluene and three 

 of phenanthrene. 



This compound forms bright yellow needles which melt at !in-99 l'., are 

 very readily soluble in benzene, soluble in acetone, ether, or glacial acetic 



d. It dissolves in pyridine, giving a violet-coloured solution, the colour of 

 which is probably due to the dissociation of the substance into its components, 

 since the trinitrotoluene itself gives a violet coloration with pyridine. 



The substance i:- much more stable than the additive compound formed 

 from p-toluidine and a-trinitrotoluene ; it is not decomposed by alcohol, noi 

 is it decomposed by acetic or hydrochloric acid. It is decomposed by 10 p.c. 

 caustic soda solution, giving a violet coloration. It gave on analysis the 

 following results: — 



0*1352 . tuce gave 14 - c.c. moist nitrogen at 18° C. 



and 74:.' m. m. p. 



corresponding t<> N 1 ()66. 

 I II X 0, requires N 10-32. 



Hence the substance ia an additive compound having a composition 

 represented by the formula 



I II ( II ,\n , .Ml, 



XVII. -I Phenanthreiu on ^-Trinitrotoluene. 



Rquimolecular quantities of /3-trinitrotoluene and phenanthrene were 

 lived in alcohol and the solutions were mixed and concentrated. The 

 solid which - on cooling -talli-.-d from alcohol and dried in 



a vacuum desiccator over calcium chloride. It formed pale yellow prismatic 

 plates, which melted at 105 C, were readily soluble in benzene, and soluble 

 in alcohol, glacial acetic acid, or ether. When In -a ted with 1" p.c caustic soda 

 solution, it di - iolet-brown coloration. On analysis it cave 



the following results: — 



0*11 - gave 10*2 cc. moist nitrogen at 11*5° C. 



and 771*5 m.m.p. 



corresponding to N 10*55. 

 II Mi. requires N 10*32. 



XVIII. .! / threne on - otoluene. 



Equimolecular proportion* rinitrotolnene and phenanthrene were 



dissolved in alcohol, and the solution- were mixed and concentrated. The solid 



which 86] in the ease of the last compound. 



