ELECTRON-DIFFRACTION DETERMINATION OF THE GAS-PHASE MOLECULAR-STRUCTURES OF 1-SILACYCLOPENT-3-ENE, 1,1-DIFLUORO-1-SILACYCLOPENT-3-ENE AND 1,1-DICHLORO-1-SILACYCLOPENT-3-ENE

被引：18

作者：

CRADOCK, S ^{[1
]}

EBSWORTH, EAV ^{[1
]}

HAMILL, BM ^{[1
]}

RANKIN, DWH ^{[1
]}

WILSON, JM ^{[1
]}

WHITEFORD, RA ^{[1
]}

机构：

[1] UNIV EDINBURGH,DEPT CHEM,EDINBURGH EH9 3JJ,MIDLOTHIAN,SCOTLAND

来源：

JOURNAL OF MOLECULAR STRUCTURE | 1979年 / 57卷 / DEC期

关键词：

D O I：

10.1016/0022-2860(79)80237-9

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The molecular structures of 1-silacyclopent-3-ene and 1,1-difluoro- and 1,1-dichloro-substituted species have been studied by electron diffraction. All three molecules have structures of C2v symmetry, but there are apparent deviations from planarity of the rings caused by ring-puckering vibrations, the amplitudes of which are greatest for the fluoride, and smallest for the chloride. For 1-silacyclopent-3-ene important parameters (ra) are as follows: r(SiC) = 189.9(3) pm; r(CC) = 153.3(4) pm; r(CC) = 135.9(6) pm; ∠ (CCC) = 118.4(2)°. For 1,1-difluoro-1-silacyclopent-3-ene, r(SiF) = 158.3(3) pm; r(SiC) = 184.7(3) pm; r(CC) = 137.8(7) pm; ∠ (CCC) = 117.9(3)°. For 1,1-dichloro-1-silacyclopent-3-ene, r(SiCl) = 206.6(4) pm; r(SiC) = 187.6(6) pm; r(CC) = 152.6(7) pm; r(CC) = 133.0(10) pm; ∠ (CCC) = 120.3(10)°; ∠ (ClSiCl) = 103.9(5)°. © 1979.

引用

页码：123 / 133

页数：11

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