DETERMINATION BY ELECTRON-DIFFRACTION OF THE MOLECULAR-STRUCTURE OF BROMOTRIS(METHOXYDIMETHYLSILYL)METHANE IN THE GAS-PHASE

被引：4

作者：

BRAIN, PT

MEHTA, M

RANKIN, DWH

ROBERTSON, HE

EABORN, C

SMITH, JD

WEBB, AD

机构：

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

[2] UNIV SUSSEX,SCH CHEM & MOLEC SCI,BRIGHTON BN1 9QJ,E SUSSEX,ENGLAND

来源：

JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS | 1995年 / 06期

关键词：

D O I：

10.1039/dt9950000975

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The molecular structure of bromotris(methoxydimethylsilyl) methane in the gas phase has been determined by electron diffraction. The molecules have C, symmetry, adopting a conformation in which the Si-O bonds are gauche with respect to the C-Br bond, and the O-C bonds are anti with respect to the inner Si-C bonds. This arrangement avoids conflict between the sterically demanding methoxydimethylsilyl groups and minimises interactions between lone pairs of electrons on the methoxy groups, which are widely separated from each other, on the periphery of the molecule. The Br-C-Si-O and C-inner-Si-O-C dihedral angles are 38.5(5) and 169.9(28)degrees respectively. Other principal parameters (r(a)) are r(C-Br) 196.0(21) pm, r(Si-C-inner) 190.6(10) pm, r(Si-C-outer) 188.3(4) pm, r(Si-O) 167.4(4) pm, r(O-C) 141.9(5) pm, and angles Br-C-Si 106.2(6)degrees, C-inner-Si-C-outer 114.7(5)degrees, C-inner-Si-O 107.3(9)degrees, C-outer-Si-O 106.4(8)degrees and Si-O-C 121.4(13)degrees.

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页码：975 / 978

页数：4

相关论文

共 13 条

[1] SOME UNUSUAL ORGANO-ZINC AND ORGANO-MERCURY COMPOUNDS - THE CRYSTAL-STRUCTURES OF THE COMPOUNDS [(HOME2SI)(ME3SI)2C]2ZN, [(MEOME2SI)(ME3SI)2C]2ZN, AND [(MEOME2SI)(ME3SI)2C]2HG [J].

AIGBIRHIO, FI ;

ALJUAID, SS ;

EABORN, C ;

HABTEMARIAM, A ;

HITCHCOCK, PB ;

SMITH, JD .

JOURNAL OF ORGANOMETALLIC CHEMISTRY, 1991, 405 (02) :149-160

[2] COMPARISON OF THE REACTIVITIES OF THE COMPOUNDS (ME3SI)2C(SIME2OME)-(SIME2CL) AND (MEOME2SI)3C(SIME2CL) - CRYSTAL-STRUCTURE OF (MEOME2SI)3-CSIPH2H [J].

AIGBIRHIO, FI ;

ALJUAID, SS ;

EABORN, C ;

HITCHCOCK, PB ;

LICKISS, PD .

JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 2, 1991, (09) :1407-1410

[3] SYNTHESIS, CRYSTAL-STRUCTURE AND REACTIONS OF THE DIMERIC ORGANOLITHIUM COMPOUND [([(MEO)ME2SI]3CLI)2] [J].

AIGBIRHIO, FI ;

BUTTRUS, NH ;

EABORN, C ;

GUPTA, SH ;

HITCHCOCK, PB ;

SMITH, JD ;

SULLIVAN, AC .

JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS, 1992, (06) :1015-1018

[4] ELECTRON-DIFFRACTION STUDIES OF TETRAMETHYLSILANE AND HEXAMETHYLDISILANE, AND DISCUSSION OF LENGTHS OF SI-C BONDS [J].

BEAGLEY, B ;

MONAGHAN, JJ ;

HEWITT, TG .

JOURNAL OF MOLECULAR STRUCTURE, 1971, 8 (04) :401-&

[5] THE MOLECULAR-STRUCTURE OF DIFLUOROPHOSPHINE SELENIDE, DETERMINED USING A COMBINATION OF GAS ELECTRON-DIFFRACTION AND LIQUID-CRYSTAL NMR DATA [J].

BOYD, ASF ;

LAURENSON, GS ;

RANKIN, DWH .

JOURNAL OF MOLECULAR STRUCTURE, 1981, 71 (FEB) :217-226

[6] DETERMINATION BY ELECTRON-DIFFRACTION OF THE MOLECULAR-STRUCTURES OF CHLORO-TRIS(TRIMETHYLSILYL)METHANE AND BROMO-TRIS(TRIMETHYLSILYL)METHANE IN THE GAS-PHASE [J].

BRAIN, PT ;

MEHTA, M ;

RANKIN, DWH ;

ROBERTSON, HE ;

EABORN, C ;

SMITH, JD ;

WEBB, AD .

JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS, 1995, (03) :349-354

[7] SOME STERICALLY HINDERED LITHIUM ALKYLBROMO-MAGNESATE AND ALKYLCHLORO-MAGNESATE, CADMATES, AND MANGANATES - CRYSTAL AND MOLECULAR-STRUCTURES OF [LI(THF)2(MU-BR)2MG(C(SIME3)3)(THF)], [LI(THF)4][(CD[C(SIME3)3])3(MU-BR)3(MU-3-BR)].0.5C6H12' [(LI(THF))3(MU-3-BR)3(MU-3-OSIME3)CD(C(SIME3)3)], AND [LI(THF)4][(MN[C(SIME3)3])3-(MU-CL)4(THF)] (THF = TETRAHYDROFURAN)H [J].

BUTTRUS, NH ;

EABORN, C ;

ELKHELI, MNA ;

HITCHCOCK, PB ;

SMITH, JD ;

SULLIVAN, AC ;

TAVAKKOLI, K .

JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS, 1988, (02) :381-391

[8] MIGRATION OF THE METHOXY GROUP IN AN ORGANOSILICON CATION - REACTIONS OF (BROMODIPHENYLSILYL)(METHOXYDIMETHYLSILYL)BIS(TRIMETHYLSILYL)METHANE WITH SILVER BOROFLUORIDE AND SILVER-CHLORIDE - CRYSTAL-STRUCTURE OF (CHLORODIPHENYLSILYL)-(METHOXYDIMETHYLSILYL)BIS(TRIMETHYLSILYL)METHANE [J].

BUTTRUS, NH ;

EABORN, C ;

HITCHCOCK, PB ;

LICKISS, PD ;

NAJIM, ST .

JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 2, 1987, (07) :891-894

[9] THE GAS-PHASE MOLECULAR-STRUCTURE OF SILYL(METHYL)-ACETYLENE (1-SILABUT-2-YNE), DETERMINED BY ELECTRON-DIFFRACTION [J].

CRADOCK, S ;

KOPROWSKI, J ;

RANKIN, DWH .

JOURNAL OF MOLECULAR STRUCTURE, 1981, 77 (1-2) :113-120

[10] ELECTRON-DIFFRACTION STUDY ON MOLECULAR-STRUCTURE OF METHYLTRIMETHOXYSILANE [J].

GERGO, E ;

HARGITTAI, I ;

SCHULTZ, GY .

JOURNAL OF ORGANOMETALLIC CHEMISTRY, 1976, 112 (01) :29-35