PROFESSOR LETTS ON PHOSPHORUS-BETAINES. 313 
apparatus which the author employed for catching any permanent gases in his 
experiments on the action of heat on salts of thetine.* 
It fused below 100° C., and effervesced between 140°-150°: after some time 
it solidified (at about 170°). A very few drops of liquid distilled, but a large 
quantity of gas was evolved, and of this more than one-third consisted of 
carbonic anhydride. The solid residue was recrystallised (1) from alcohol, in 
which it was very soluble, and another crop of crystals (2) was obtained from 
the mother liquor. 
Bromine was determined in each of these. 
(1) 06051 gave 05345 AgBr = 0:2275 Br = 37°59 per cent. Br. 
Cire C4004. 03b86 == 01527 1, 37-2 . 
CYLOPVCELEO OGM OSBO IG = 10-2468 Ss STAAL, 
These numbers agree with the bromine calculated for bromide of triethyl- 
methyl-phosphonium. 
Obtained. Calculated for (C,H,;),(CH,)PBr. 
e Il. 
a b 
Bromine, . Sr 6 MOR IISF2 VSP uA, a; -§ ORD. 
Some of the crystallised product which had yielded these numbers was 
dissolved in water and treated with oxide of silver, hydrochloric acid, and 
chloride of platinum in succession, when an orange-coloured precipitate was 
formed. This chloroplatinate was dissolved in boiling water, and separated as 
the solution cooled in very characteristic crystals, consisting of minute octohedra, 
usually truncated at their solid angles. 
Analysis of these showed them to consist of the chloroplatinate of triethy!- 
methyl-phosphonium. 
Platinum. 
(1) 0-600 gave 0174 Pt = 29-0 per cent. Pt. 
(2) 08563 ,, 02504, = 29:2 ‘ 
Carbon and Hydrogen. 
0:6703 gave 0°3253 H,O = 0:03614 H = 5:4 per cent. H 
06783 ,, 06035 CO, = 01646 C = 24°5 per cent. C 
Obtained. Calculated for 2 {(C,H;),(CH,)PCl} , PtCl, 
F, Iz 
Platinum, . 4152970 29:2 : i ‘ : 2971 
Carbon, : oo 24:5 , ; : : 248 
Hydrogen, . ._ 54 : : ; : 53 
These numbers show that the solid product of the action of heat on the 
* These Transactions, vol. xxviii. p. 597. 
