196 
Proceedings of Boyal Society of Edinburgh. [sess. 
Platinum Salt . — Prepared by mixing alcoholic solutions of 
chloride of platinum and of the substance. The compound crystal- 
lises out in minute leaflets. The composition of the substance varies 
with the conditions under which it is prepared. 
Obtained from 
Hofmann’s Dibenzyl-Phosphine. 
I. II. III. 
Carbon, 59 *5 56*6 58*5 
Hydrogen, 5 ‘8 5 ’3 5*9 
Chlorine, 
Platinum, 12'8 13*1 13*1 
I., II., III., IV., and Y. were all separate preparations, obtained 
under slightly different conditions. 
Calculated for 
5(C 7 H 7 ) 2 HP. PtCl 4 
4(C 7 H 7 ) 3 P0. 2HCl.PtCf 
Carbon, 59 5 
Hydrogen, 5*3 
59*5 
5*0 
Chlorine, 
11*7 
Platinum, 14*0 
12*5 
Iodide . — Prepared like the bromide. It crystallises in minute 
red crystals of the same colour as ferricyanide of potassium. 
Obtained. Calculated for 
Iodine, 36*86 {(C 7 H 7 ) 2 HP ( 2 I 2 I 7(C 7 H 7 ) 3 PO. 5I 2 I 5(C 7 H 7 ) 3 P0.4I 2 
37*24 I 36*18 " | 38*84 
Chloride . — Obtained by passing chlorine into a solution of the 
body dissolved to saturation in warm acetic acid. It crystallises 
when the solution cools in pale yellow crystals, much like penta- 
chloride of phosphorus in appearance. The compound is most 
unstable, and loses chlorine rapidly in vacuo % and probably also 
when air-dried. 
Obtained. Calculated for 
Chlorine, 12*00 (C 7 H 7 ) 2 HPC1 . 7(C 7 H 7 ) 3 P0.5cT 2 
14*23 | 14*68 
Hydriodate. Obtained by saturating a solution of the body in 
glacial acetic acid with hydriodic acid gas, and separated as the 
solution cooled in colourless crystals. 
Obtained. Calculated for 
)xide of Tribenzyl-Phospliine. 
58*5 59*4 
5*3 5*4 
1l2' 
Iodine, 
2(C 7 H 7 ) 2 PH.HI I 3(C 7 H 7 ) 3 P0.2HI. 
22*8 I 21*05 
