UNSTABLE METHOXYCYCLOSILOXANES [(CH3O)SIO]2, [(CH3O)SIO]3 - THERMAL GENERATION AND DIRECT MASS-SPECTRAL STUDIES

被引：6

作者：

TAMAS, J ^{[1
]}

GOMORY, A ^{[1
]}

BESENYEI, I ^{[1
]}

KHABASHESKU, VN ^{[1
]}

KERZINA, ZA ^{[1
]}

KAGRAMANOV, ND ^{[1
]}

BRAGILEVSKY, IO ^{[1
]}

机构：

[1] ND ZELINSKII ORGAN CHEM INST,MOSCOW 117913,USSR

来源：

JOURNAL OF ORGANOMETALLIC CHEMISTRY | 1990年 / 387卷 / 02期

关键词：

D O I：

10.1016/0022-328X(90)80019-V

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Direct evidence for formation of unstable methoxy cyclosiloxanes [(CH3O)2SiO]2 (1) and [(CH3O)2SiO]3 (2) in the gas phase has been obtained by a mass-spectral study of the vacuum pyrolysis of 3,3-dimethoxy-6-oxa-3-silabicyclo[3.1.0]hexane (4). Intermediates 1 and 2 have been detected in the mass spectra of the pyrolysis products of 4 as the corresponding molecular ions, and identified from their exact masses and compositions. The metastable transitions recorded by B/E scan show the fragmentation trends of 1, 2 and 4 under electron impact (70 eV). The ionization energies (IE), determined for 1 (8.81 ± 0.1 eV) and 2 (8.50 ± 0.1 eV) are considerably lower than than the IE of linear methoxysubstituted silanes and alkanes. © 1990.

引用

页码：147 / 152

页数：6

共 9 条

[1] IONIZATION POTENTIALS OF SOME HYDROCARBON SERIES [J].