Table 1.

Monoisotopic spectrum of $B_3^{11}{({\mathit{CH}}_3)}_6{P}_3{({\mathit{CH}}_3)}_6$

m/e	Ion	50 volts	20 volts
41	B(CH3)2	30.5	1.61
46	P(CH3)	.96	.52
61	P(CH3)2	.55	.17
62	PH(CII3)2	.85	.57
63	PH2(CH3)2	.90	.05
87	BP(CH3)3	1.95	.36
102	BP(CH3)4	2.7	.47
103	BPH(CH3)4	10.9	2.02
113	B2P(CH3)4	1.06	…………
129	B2PH(CH3)5	5.3	2.44
143	B2P(CH3)6	100	100
159	B2P2(CH3)5	1.07	.27
163	BP2(CH3)6	.58	.22
189	B2P2(CH3)7	16.4	21.7
245	B3P2(CH3)10	27.6	59.3
291	B3P3(CH3)11	8.3	17.6
306	B3P3(CH3)12	.76	.99