Sterically encumbered charge-compensated carbaboranes: Synthesis and reactivity - Molecular structures of 7-Ph-11-SMe2-7,8-nido-C2B9H10 and 1-Ph-3,3-(CO2-7-SMe)(2)-3,1,2-closo-RhC2B9H8

被引：27
|
作者：
Rosair, GM [1 ]
Welch, AJ [1 ]
Weller, AS [1 ]
Zahn, SK [1 ]
机构：
[1] HERIOT WATT UNIV,DEPT CHEM,EDINBURGH EH14 4AS,MIDLOTHIAN,SCOTLAND
来源：
JOURNAL OF ORGANOMETALLIC CHEMISTRY | 1997年 / 536卷 / 1-2期
关键词：
boron; rhodium; carbaboranes; steric effects; crystal structure;
D O I：
10.1016/S0022-328X(96)06740-X
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Reaction between K[7-Ph-7,8-nido-C2B9H11] and dmso in H2SO4 affords a mixture of the isomers 7-Ph-9-SMe2-7,8-nido-C2B9H10 (1a) and 7-Ph-11-SMe2-7,8-nido-C2B9H10 (1b). Similarly, starting from K[7,8-Ph-2-7,8-nido-C2B9H10], the diphenyl analogue 7,8-Ph-2-9-SMe2-7,8-nido-C2B9H9 (2) was produced. These three new nido carbaboranes have been characterised spectroscopically, including B-11-B-11 COSY and H-1-H-1 NOESY experiments, and by a single crystal diffraction study on 1b. Deprotonation of 1a followed by addition of [RhCl(CO)(2)](2) affords the carbametallaborane 1-Ph-3,3-(CO)(2)-7-SMe2-3,1,2-closo-RhC2B9H9 (3), characterised by R-1 and H-1 and B-11 NMR spectroscopies and by a crystallographic study. (C) 1997 Elsevier Science S.A.
引用
收藏
页码：299 / 308
页数：10
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