0. L. Jackson—Methyl and Benzyl Compounds. 143 
in methyl by phenyl (which converts it into benzyl, HCH, 
into C,H,CH,), should produce such a complete change in its 
attractions, 
The nitrate of benzylselenide gave with potassic iodide a 
very unstable yellow precipitate. 
Benzyl Selenide Platinic Chloride [(C, nies ],PtCl,, was 
prepared by mixing alcoholic peneyinon ochloride with aqueous 
falatthis chloride. I could not obtain it crystallized, as its solu- 
tions et a on evaporation. It was therefore purified by 
washing with a 
Caleulated for a H,),Se],PtCl,. Observed. 
PIAunoni css ed ‘97 22°32 
It is a yellow powder pee in water, slightly soluble in 
alcohol ; on heating it turned black and gave off a combustible 
hy Benzyl Diselenide (C,H,),Se,, was prepared by treating a 
sodic selenide (from t the reduction of Na,SeO, with charcoa oal) 
with benzyl chloride, this being the method by which Wéohler 
and Dean obtained their so-called methyl monoselenide; but, 
as l expected from Rathke’s researches in the ethyl series, 1 
obtained eer ioe re with any a base of monoselenide. 
The crude sodic selenide was boiled in a flask, with a return- 
cooler owith aleohol and engl ahiibeides the liquid thus ob- 
tained deposited light yellow scales which were purified by 
crystallization from boiling alcoho 
Calculated for (C,H, ie Observed. 
OAPHON cs ae + = 49°70 48°75 
Hydrogen .... 4.14 4°48 
It forms straw-yellow scales which are superficially decom- 
by direct sunlight, burning brilliant red. It has very 
ittle ae melts at 90° mens and remains fluid a long time 
after it has been melted, burns with a blue selenium flame, and 
is insoluble in water, freely slate in hot alcohol, less so in 
cold, soluble in ether, reacted on by hydrochloric acid, but 
oxidized by nitri 
Benzylselenious emery (C,H ,)SeOOH.—When benzyl disele- 
nide was treated with strong nitric acid it dissolyed with 
poe of nitrous fumes to a colorless poh which on 
AY ed b 
cooling crystallized in white needles hese were purifi y 
recrystallization from aleohol or hot water. 
Caloulated for (C,H,,)SeOOH Observed. 
Carboti . 20 00: 41°58 41°61 
Hydrogen ..... 39 4:25 
It occurs in radiated groups of white needles with a weak 
odor when pure; when slightly impure it smells like the 
