146 C. L. Jackson—Methyl and Benzyl Compounds. 
(C,H,)Se,+5CH sl =(CH,),SeI + (C,H)(CHs)Sel,+C,HI 
The aa of C,H.I was proved by obtaining tribenzyl- 
amine, (C,H,),N, b ‘heating with alcoholic ammonia. The 
white crystals ‘were converted into the chloride by treatment 
with argentic chloride, and from this the platinum salt was 
made and analyze 
Calculated for see 3)38eCl],PtCl,. Observed. 
07 29°27 
COB es 28 ose eas otk 11°42 
Hydrogen .....-... 2°74 aes 2°79 
so ce pg oma tater Trivodide (C,H,)(CH,), Sel ,.—The 
black residue already mentioned was s washed very thoroughly 
with alcohol to free it from benzyl iodide and then recrystal- 
lized from boiling alcoho 
Calculated for C11 . HOH Observed. 
BIRO. oa 19°34. 18°92 oe 
Hydrogen .... ... ao 7 2°66 2°87 een 
PS es, ea cea. 65°69 65°69 bc a 
It forms very heavy black needles, with a metallic luster like 
that of iodine, and a most offensive odor. It melts at 65°, but 
softens a few degrees below its melting-point. Heated some- 
what more it gives off vapors which attack the eyes violently, 
is insoluble in water, slightly soluble in cold alcohol, quite so 
in hot, slightly in ether. Its solutions are red, and are decolor- 
ed by gentle heating with metallic mercury. Rathke ob- 
served a similar action with a black oil which he obtained by 
acting on triethylselenonium iodide with iodine. This was un- 
doubtedly the triiodide, but he gives no analysis of it. I have 
also obtained a black oil by treating trimethylselenonium iodide 
with iodine, which must be (CH,),Se 
Platino o-benzyldimethylselenonium ‘Chloride [(C,H,) (CHs}SeO 
PtCl,, was prepared by precipitating the iodine out of t 
Idimethylselenonium triiodide with argentic nitrate, esr 
the filtrate with hydrochloric acid, and after filtering from argen- 
tic chloride adding platinic chloride. A yellow crystalline pre- 
cipitate was gradually formed which was washed with alcohol. 
Calculated fo: ct) er eeseaeetenen Observed. 
Platinum ..-.--- 24°03 
It forms corn-colored anes oe scales, which appear square 
with obtuse re-entering angles under the microscope, and is 
insoluble in water and alcohol. On heating it turns brown 
below , and at a somewhat higher temperature becomes 
black and gives off a See Beis 
e details of the e found in an article soon 
to appear in Liebig’s Peaaten ao der Che mie und Pharmacie. 
