316 PROFESSOR LETTS ON PHOSPHORUS-BETAINES. 
Action of Heat on Hydrochlorate of Triethyl-Phosphorus-Betaine.—The ex- 
periments made with this substance were conducted in the same apparatus 
as was employed for studying the action of heat on the ethyl-chlorate. 
The hydrochlorate had been recrystallised two or three times from alcohol 
and ether, and was perfectly pure. 
It fused at 145°-150°, then violently effervesced, and after a short time 
solidified to a snow-white mass. The gas evolved consisted of pure carbonic 
anhydride, and amounted to almost exactly the quantity calculated from the 
equation,* 
CH, 000 .H CH, 
6 pF ee _(OH)P CO. 
(CH PC (CH PC” + 00, 
The solid product gave the characteristic chloroplatinate of triethyl-methyl- 
phosphonium, which was analysed. 
05255 germs. gave 0:1558Pt = 29-4 per cent. 
0°5255 ,, gave 0°6735 AgC1l— 01666 Cl= 317 __,, 
Obtained. Calculated for 2 {(C,H,),(CH,)PCl} PtCl,. © 
Platinum, . cl 2 & : : : 3 29-1 
Chlorine, . SP Sieg: i Ae . ‘ ‘. : oD 
Action of Heat on the Hydrobromate.—The recrystallised hydrobromate 
obtained from the hydrochlorate (see p. 304) was also submitted to the action 
of heat. It fused, effervesced from the escape of carbonic anhydride, and 
then solidified. The residue yielded the characteristic chloroplatinate of 
triethyl-methyl-phosphonium. 
Action of Heat on the Hydrate.—The change which the hydrate suffers 
when heated is very interesting, and was discovered quite accidentally. Wish- 
ing to concentrate its aqueous solution, the latter was evaporated on the water 
bath. When most of the water had been driven off, and a syrupy liquid 
remained, the author noticed a smell of triethyl-phosphine. Fearing decom- 
position, the heating was stopped, and the ‘syrupy liquid was placed in the 
receiver of the air-pump over sulphuric acid. On exhausting the air, effer- 
vescence occurred, and the syrup solidified. After some time it was removed, 
and the drying completed on a water bath. 
The dried mass effervesced with acids, even the weakest, such as tartaric 
acid. It at once gave an insoluble precipitate of a light orange colour when 
its solution was mixed with chloride of platinum, and its solution precipitated 
* 78:2 cc, were obtained from 0°762 grms, of the hydrochlorate instead of 80 ce, 
