Table 2. Spectral and Retention Data Experimentally Determined for O-Alkyl O-Trimethylsilyl Ethylphosphonates.

Lp.	R	molecular weightb	M+• in EI %	The base peak in EI m/z	[M + H]+ in CI m/z	[M + H]+ in CI %	[M + 29]+ in CI %	[M + 41]+ in CI %	m/z 167 in CI %	m/z 183 in CI %	[M + 73]+ in CI m/z	[M + 73]+ in CI %	base peak in CI m/z	LTPRI
1	methyl	196	7	181	197	100	23	10	2	2	269	1	197	1105
2	ethyl	210	7	167	211	100	27	13	5	6	283	18	211	1158
3	1-propyl	224		167	225	100	26	15	12	21	297	24	225	1243
4	1-butyl	238		167	239	100	23	14	13	36	311	6	239	1334
5	1-pentyl	252		167	253	100	26	14	12	37	325	28	253	1425
6	1-hexyl	266		167	267	100	27	14	11	36	339	31	267	1522
7	1-heptyl	280		167	281	100	27	14	9	34	353	30	281	1617
8	1-octyl	294		167	295	100	27	13	8	32	367	24	295	1716
9	1-nonyl	308		167	309	100	26	12	7	30	381	12	309	1812
10	1-decyl	322		183	323	100	25	11	5	25	395	6	323	1914
11	1-undecyl	336		183	337	100	25	11	5	24	409	13	337	2010
12	1-dodecyl	350		183	351	100	24	10	5	23	423	7	351	2111
13	2-propyl	224	1	167	225	72	0	6	36	100	297	28	183	1180
14	2-butyla	238		167	239	74	0	0	33	100	311	44	183	1272
15	2-pentyla	252 T		167	253	60	6	3	31	100	325	30	183	1359
16	2-hexyla	266 T		167	267	48	2	1	28	100	339	18	183	1430
17	cyclobutyl	236		167	237	100	14	11	12	40	309	13	237	1368
18	cyclopentyl	250		167	251	54	0	0	30	100	323	31	183	1465
19	cyclohexyl	264		167	265	60	0	0	30	100	337	27	183	1564
20	cycloheptyl	278		167	279	20	0	0	26	100	351	6	183	1690
21	cyclooctyl	292		167	293	6	0	0	25	100	365	1	183	1807
22	3-pentyl	252		167	253	57	0	0	30	100	325	34	183	1364
23	3-hexyla	266		167	267	21	2	0	27	100	339	4	183	1430
24	2-methyl-1-propyl	238		167	239	97	12	15	36	100	311	8	183	1293
25	2,2-dimethyl-1-propyl	252		167	253	100	8	11	31	92	325	76	253	1328
26	2-methyl-1-butyl	252		167	253	93	10	13	35	100	325	24	183	1386
27	3-methyl-1-butyla	252		167	253	100	25	15	14	43	323	27	253	1387
28	3-methyl-2-butyla	252 T		167	253	12	0	0	27	100	325	1	183	1340
29	2-methyl-1-pentyla	266		167	267	93	11	13	33	100	339	26	183	1469
30	2-ethyl-1-butyl	266		167	267	79	9	10	32	100	339	25	183	1471
31	4-methyl-2-pentyla	266 T		167	267	18	1	1	27	100	339	2	183	1389
32	pinacolyla	266		167	267	62	3	0	20	81	339	100	339	1387

^aAlcohol with a chiral center.

^bT – triple peaks in the chromatogram; LTPRI – linear temperature programmed retention index.