Syntheses and Structures of Sil abridged Hafnocene Dichlorides

被引：0

作者：

ZHOU Xiuzhong WANG Ying and XU Shansheng Department of Chemistry Nankai University Tianjin WANG Honggen and YAO Xinkai Central Laboratory Nankai University Tianjin ^{[300071
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机构：

来源：

ChemicalResearchinChineseUniversities | 1992年 / 03期

关键词：

Silabridged hafnocene dichloride; Synthesis; Molecular structure;

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摘要：

<正> The present paper covers three silabridged hafnocene dichlorides(1, 2 and 3) prepared by sequential reactions of α, ω-dichloropermethyl polysilane with cyclopentadienyl sodium, n-butyl lithium and hafnium tetrachloride. Their structures were characterized by elemental analyses, UV, 1H(13C) NMR and MS. Furthermore the crystal and molecular structures of 1 and 2 were determined by X-ray diffraction method. The crystal of 1 is monoclinic, space group C2/c with a=1. 3401(4), b=0. 9977(3), c = 1. 0922(4) nm; β=94. 07(1)° V=3. 6342 nm3, Z = 2, Dc = 2.155 g·cm-3. The final deviation factor R = 0. 064. The crystal of 2 is monoclinic, space group P21/c with a=0.0847(1), b=1.5181(1), c=2.9824(2) nm; β= 94. 07(1)°? V=3.634 nm3; Dc= l. 805 g·cm-3. The final deviation factor R = 0. 033. The relationship between the silabridged structure and spectral properties is also discussed.

引用

页码：239 / 246

页数：8