( 453 ) 
not only combine with acids but also with methyl iodide but of 
this they only absorb one molecule; these compounds yield beautiful 
crystals, that of the methyl ester melts at J44° — 145°, that of the 
ethyl ester at 143°. 
About a year ago I obtained, by the reduction of piperazino N{di) 
acetonitrile with sodium and alcohol a beautifully crystallised amine, 
which gave the carbylamine reaction and of which the hydrochloride 
and the hydroplatinichloride compounds pointed, on analysis, to 
the compound expected, namely piperazino N{di) ethyleneamine 
CH, —- CH 2 . NH, 
CH, — f— CH 
i i > 
CH, — N — CH 3 
^CH, — CH 2 . NH, 
which is, therefore, a cyclic bitertiary 
amine, and also twice a primary amine, a combination which, as 
far as I am aware, is not as yet known and is being further 
investigated by us. 
It yields with water a crystallised compound m. p. 63 J (the 
anhydrous compound melts at 40'—41°), which is hygroscopic and 
gives a white precipitate with Nessler’s reagent. With four mols. of 
hydrogen chloride a compound is formed which is very soluble in 
water and yields beautiful anhydrous crystals,which are non-hygroscopic. 
Beautiful compounds are also formed with four mols. of picric 
acid and with four mols. of oxalic acid. When recrystallised from 
boiling water, the first forms golden yellow lustrous scales, the 
second colourless crystals sparingly soluble in cold water. With two 
mols. of picryl chloride it yields a picryl derivative which is very 
sparingly soluble in the jusual organic solvents but may be recrys¬ 
tallised from pyridine, and then forms brownish-yellow crystals; the 
compound is decomposed on heating at about 238°. A benzoyl 
derivative was also obtained, of which more later on. As this amine 
behaved strangely in some respects we thought it desirable to 
study one of its homologues also, by way of comparison, and 
chose in the first, place the lower compound piperazino N{di) methy - 
CH,. NH, 
CH, — CH, 
Imeamine | [ . We did not succeed in preparing it from 
CH 2 — N — CH 2 
\ 
CH,. NH, 
