488 
DE. A. W. TTOPlfAW OX THE PHOSPHOErS-BASES. 
Theory. 
Experiment. 
Vinyl- Tetrethyl- 
compound. compound. 
r 
I. 
II. 
HI. IV. 
V. 
Carbon 
Hydrogen . 
. 27*41 
. 5*14 
27*26 
5*68 
27*25 
5*80 
27*05 
5*71 
- 
Platinum . 
. 28*19 
28*02 
27*81 27*94 
28*14 
The hydrogen-determinations prove unequivocally that the compound is the plati- 
num-salt of the tetrethylphosphonium. The formation of the tetrethylphosphonium- 
compound is moreover demonstrated by the analysis of the corresponding gold-salt. 
I. 0-5783 grm, of gold-salt gave 0'4158 grm. of carbonic acid and 0*2200 grm. of 
water. 
II. 0-5795 grm. of gold-salt, treated with sulphuretted hydrogen, &c., gave 0*2352 
grm. of gold. 
Theory. Experiment. 
r: ; ^ , , ^ . 
Viuy 1-triethyl- Tetrethyl- 
phosphonium-salt. phosphonium-salt. I. II. 
Carbon . . 19*83 19*75 
Hydrogen. . 3*71 4*11 
Gold . . . 40*70 40*53 
19.61 
4*22 
40*59 
Here likewise the hydrogen-determination is characteristic of the tetrethylphos- 
phonium-compound. The result of analysis is most satisfactorily confii*med by the 
crystallographical examination of the salts under consideration. Q. Sella has com- 
pared the crystals of the iodide above-mentioned with crystals of iodide of tetrethyl- 
phosphonium obtained in the usual way. I have appended at the conclusion of 
this paper the elaborate investigation of this beautiful salt, vrith which my fiiend has 
famished me. 
Far less conclusive is the experimental eAidence which I am enabled to offer in sup- 
port of the opinion, that the hydrate of tetrethylphosphonium formed by the action of 
heat on the hydrated diphosphonium is accompanied by the oxethylated triethylphos- 
phonium-compound. The principal argument in favour of this new is the abundant 
evolution of triethylphosphine, which cannot be understood unless we assume the 
simultaneous formation of the oxethylated, or the vinyl-compound. I have failed in 
my endeavours to prepare the more soluble iodide which accompanies the tetrethyl- 
phosphonium-compound in a state of purity. Nor was the attempt to separate the two 
compounds in the form of platinum-salts rewarded by better success. Both platinum- 
salts crystallize in octohedra which differ but slightly in solubility. Nevertheless the 
following determinations leave but little doubt as to the presence of the oxethylated 
phosphonium among the products resulting from the decomposition of the hydrate of 
diphosphonium under the influence of heat. 
I. 0*320 grm. of platinum-salt gave 0*3091 grm. of carbonic acid and 0*1625 grm. 
of water. 
