AN ABINITIO IGLO NMR-STUDY OF CLOSO-C2B6H8, CLOSO-CB7H8-, CLOSO-B8H8(2-), AND C3B5H7

被引:36
作者
BAUSCH, JW
PRAKASH, GKS
WILLIAMS, RE
机构
[1] UNIV SO CALIF,DONALD P & KATHERINE B LOKER HYDROCARBON RES INST,LOS ANGELES,CA 90089
[2] UNIV SO CALIF,DEPT CHEM,LOS ANGELES,CA 90089
关键词
D O I
10.1021/ic00044a018
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
The closo electron count compounds C2B6H8, B8H82-, CB7H8-, and C3B5H7 have been studied using the combined ab initio/IGLO/NMR method. C2B6H8 and the 'high-temperature" isomer of B8H82- have been reconfirmed as having the same bisdisphenoidal structures in the fluid phase as in the crystalline phase. The structure of the second "low-temperature" isomer of B8H82- in solution remains unresolved. The carborane CB7H8- is also shown to have a fluxional closo geometry in solution. The carborane C3B5H7 probably does not have the closo geometry in solution as has been suggested.
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页码:3763 / 3768
页数:6
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