302 PROFESSOR LETTS ON PHOSPHORUS-BETAINES. 
immersing the distilling flask containing it in cold water. In about an hour 
and a half’s time the whole solidified to a solid crystallie mass, ge was 
perfectly white and very hard. 
This was washed several times with dry ether to remove any phosphine or 
chloracetic acid that had not been acted on. As chloroform had been found to 
be very suitable for dissolving organic phosphorised compounds, an attempt was 
made to get the product into solution by its means, but it did not appear to 
dissolve it perceptibly. Alcohol, however, dissolved it with tolerable ease, and 
on cautiously adding dry ether to the warm solution until the mixture became 
turbid, and then allowing it to stand, beautiful glittering crystals separated, 
which at first appeared to be needles, but afterwards grew into rhombohedral 
plates about 2 mm. in length. 
Nearly the whole of the product was thus recrystallised, then dried in the 
desiccator 7z vacuo, and submitted to analysis. 
Chlorine.—By precipitation with nitrate of silver. 
(1) 0:4485 gave 0:282 AgCl = 0:07025 Cl = 15°6 per cent. Cl 
(2) 06385. ,, 03995 ,. = 0:09952 ,, = 15:6 59 35 
Carbon and Hydrogen.—By combustion with chromate of lead: the front of the tube con- 
taining a mixture of the chromate and oxide of copper.* 
(1) 1:296 gave 0°7722 H,O = 0:0858 H = 6°6 per cent. H 
1:296 ,, 2°4013 CO, = 06549 C = 505 4 C 
(2) 05165 ,, 03705 H,O0 = 0:04116H= 80 i H 
0b 1pb > 09451. CO, = 025775 € = 50:0 = C 
Obtained. Calculated for 
os Cl cl 
Z a (CoHs)sP<coy,-cooH (CsHs)s’<oH, _ co00,H; 
Chlorine, . : 15°6 156 : € #67 : ‘ 14°8 
Carbon, . : 50°5 50:0 xt ,  abaeil ; : 49:9 
Hydrogen, ‘ 6°6 8:0 : ; 8°5 : ; O1 
These results indicated that the product was not a pure substance. 
The action of chloracetic: acid on triethyl-phosphine was repeated with larger 
quantities, exactly the same phenomena being observed as before. | 
The product, however, was twice recrystallised from alcohol and ether, and 
was obtained in beautiful colourless needles more than half an inch long. 
These were analysed, and were found to have the composition required for 
the product of union of a molecule of chloracetic acid with one of triethyl- 
phosphine. 
* Neither of these combustions can be relied on as the compound in both cases decomposed with 
unexpected rapidity, and the sulphuric acid in the drying tube blackened, showing that the oxidation 
had not been complete. 
