PROFESSOR LETTS ON PHOSPHORUS-BETAINES. 329 
It was melted out into a test tube, and three weighed tubes filled with it. 
These were then sealed up, and used for determinations of carbon, hydrogen, 
and bromine. 
Bromine— 
0'6233 gave 0-4682 AgBr=019818 Br=31°7 per cent, 
Carbon and Hydrogen. (By combustion of the substance with oxide of copper and 
chromate of lead, a stream of oxygen being passed through the combustion tube at the end of 
the analysis)*— 
(1) 045361 gave 03184 H,O = 0:03577 H = 18 percent. H. 
04536 , 0607 CO, = 0:065545 H = 365 . Cc: 
(2) 0:3329 gave 0:2436 HO, = 0:02706 H 
03829) | «5... 04515 ,.CO;,,= 0:12313 , C 
ll 
ll 
8:1 per cent. H. 
37°0 %5 Cox 
In another experiment, conducted in the same manner with 12 grms. of the 
phosphine and 14 germs. of bromacetic acid, the same phenomena were observed: 
17 grms. of crude crystalline product were obtained. This was distilled twice. 
It began to boil at 302°, the temperature was constant at 303°, and the distilla- 
tion was ended at 306°. 
The portion boiling from 302°-304° was at once melted intoa test tube, and 
three small tubes were filled for analysis and sealed off. 
Bromine— 
0-7504 grms, gave 0°553 AgBr=0°234074 Br=31:2 per cent. 
0:4203 t ss 01320 = ,, =31'4 
Carbon and Hydrogen— 
0:349 gave 0:2578 H,O =0:02864 H=8:2 per cent. 
0349 > 04810". =O1s117 C= 376 5, 
Another specimen similarly prepared boiled between 303°-308° C. The 
results of its analysis were as follows .— 
PE) 
Bromine—V olumetrically. 
(1) 0:296 gave 0:09120 Br=30°9 per cent. Bromine. 
(2) 0800 ,, 024880 ,, =31:°0 
Carbon and Hydrogen—t 
04951 gave 06584 CO,=0:179564 C=36:3 per cent. Carbon , 
04951 , 03623 ,, =0:040255 H=8-1 2 Hydrogen. 
2? 
In these analyses the carbon and bromine agree with the percentages 
required for a product of addition, of one molecule of bromacetic acid and one 
of triethyl-phosphine. 
* This combustion cannot be relied upon, as the substance volatilised with unexpected rapidity, and 
probably some carbonic acid was lost. 
+ Volumetrically by VotpHarpt’s method. 
+ This combustion may have given a slight deficiency in carbon, as the substance volatilised very 
rapidly when it was first melted out of the tube. 
