CRYSTAL AND MOLECULAR-STRUCTURE OF PENTAPHENYL-[TRIS(TRIMETHYLSILYL)METHYL]DIPLUMBANE

被引：12
|
作者：
MALLELA, SP [1 ]
MYRCZEK, J [1 ]
BERNAL, I [1 ]
GEANANGEL, RA [1 ]
机构：
[1] UNIV HOUSTON,DEPT CHEM,HOUSTON,TX 77204
来源：
JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS | 1993年 / 19期
关键词：
D O I：
10.1039/dt9930002891
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The reaction of PbPh2Cl2 with two equivalents of Li[C(SiMe3)3] gave the diplumbane. Ph3Pb-Pb[C(SiMe3)3]Ph2 instead of the expected Pb[C(SiMe3)3]2Ph2. A crystal-structure determination confirmed the presence of a Pb-Pb bond and the arrangement of the six substituents suggested that considerable steric strain between the C(SiMe3)3 group and the phenyls is present. Force-field calculations indicate that the structure of the expected product, Pb[C(SiMe3)3]2Ph2, may be severely distorted due to the presence of the two bulky groups. Possible steps in the formation pathway leading to the observed product, involving a phenyl group migration and radical coupling to give a Pb-Pb bond are discussed.
引用
收藏
页码：2891 / 2894
页数：4
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