DE. A. W. HOFMANN ON THE PHOSPHOEHS-BASES. 
463 
The above equation represents the final result of the action of heat ; this final result, 
however, is preceded by several intermediate changes, to which I shall return in a sub- 
sequent chapter of this paper. 
Bromide . — Extremely soluble. Dries up over sulphuric acid to an indistinct crystal- 
fine mass. 
Chloride . — This compound resembles the bromide in every respect. Both these salts 
readily form double compounds with iodide and bromide of zinc. The chloride, under 
the infiuence of pentabromide and pentachloride of phosphorus, undergoes remarkable 
transformations, to which I shall presently recur. 
Perchlorate . — Laminae somewhat sparingly soluble in cold water. 
I have not analysed any of these salts, inasmuch as the composition of this series of 
compounds is sufiiciently established by the analysis of the platinum-salt and gold-salt. 
Platinum-salt . — The alkaline solution, from which the iodide was obtained, yields, 
when satm-ated with hydrochloric acid, mixed with dichloride of platinum, and evapo- 
rated, the above-mentioned platinum-salt, crystallizing in well-developed octohedra, the 
measurements of which I subjoin. It is easily soluble in hot water, and may be recry- 
stallized without decomposition. 
Its composition is 
Cj H^o 0 p Pt a, = [(C^ Hj O) (Cj HO 3 P] Cl, Pt a,, 
as appears from the following analysis : — 
I. 0‘4626 grm. of platinum-salt gave 0’4510 grm. of carbonic acid and 0'2217 grm. of 
water. 
II. 0-5278 gi'm. of platinum-salt, when fused with carbonate of sodium, gave 0-1408 
grm. of platinum and 0-6175 grm. of chloride of silver. 
III. 0-5195 gi’m. of platinum-salt gave 0-1405 grm. of platinum and 0-6110 grm. of 
chloride of silver. 
IV. 1-3105 grm. of platinum- salt, precipitated with hydrosulphuric acid, gave 0-3522 
grm. of platinum. 
The several salts analysed were of different preparations. The specimen submitted to 
analysis IV. was obtained under particular conditions, to which I shall return hereafter. 
TheorjL 
A 
r 
Cs 
96 
26-07 
H..0 
20 
5-43 
0 
16 
4-35 
P 
31 
8-42 
Pt 
98-7 
26-81 
CI 3 
106-5 
28-92 
368-2 
100-00 
Experiment. 
A. 
1. II. III. IV. 
26-58 
5-32 — 
26-68 27-04 26-87 
28-94 29-08 
