THE FIRST UNAMBIGUOUS CHARACTERIZATION OF A NEUTRAL PHOSPHORUS YLIDE-LITHIUM COMPLES - ISOLATION, STRUCTURE, AND AB-INITIO INVESTIGATIONS OF [(PHCH(2))(2)NLI.CH(2)PPH(3)](2)

被引:40
作者
ARMSTRONG, DR
DAVIDSON, MG
MONCRIEFF, D
机构
[1] UNIV CAMBRIDGE,CHEM LAB,CAMBRIDGE CB2 1EW,ENGLAND
[2] UNIV STRATHCLYDE,DEPT PURE & APPL CHEM,GLASGOW G1 1LX,LANARK,SCOTLAND
[3] FLORIDA STATE UNIV,SUPERCOMP COMPUTAT RES INST,TALLAHASSEE,FL 32306
来源
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH | 1995年 / 34卷 / 04期
关键词
AB INITIO CALCULATIONS; ALKALI METAL COMPOUNDS; AMIDES; PHOSPHORUS YLIDES;
D O I
10.1002/anie.199504781
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
A four‐membered ring of two lithium and two nitrogen atoms is in the central unit of the dimer in the title (1), a complex between an alkali metal and a neutral phosphorus ylide. Surprisingly, this is the first time that such a model complex for the generation of ylides from phosphonium salts and alkali metal bases has been characterized in the solid state. The structure in solution was also determined, and the complexation energies for this and other model complexes were estimated by ab initio calculations. (Formula Presented.) Copyright © 1995 by VCH Verlagsgesellschaft mbH, Germany
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页码:478 / 481
页数:4
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