STERICALLY CONGESTED MOLECULES .5. TRIMERIC [ALPHA-(1,1,3,3-TETRAMETHYL-2-INDANYLIDENE)BENZYL]LITHIUM - STRUCTURAL EXAMPLE OF AN UNSOLVATED VINYLLITHIUM DERIVATIVE

被引：17

作者：

KNORR, R ^{[1
]}

HOANG, TP ^{[1
]}

NOTH, H ^{[1
]}

LINTI, G ^{[1
]}

机构：

[1] UNIV MUNICH,INST ANORGAN CHEM,W-8000 MUNICH 2,GERMANY

来源：

ORGANOMETALLICS | 1992年 / 11卷 / 07期

关键词：

D O I：

10.1021/om00043a060

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The X-ray structure of [alpha-(1,1,3,3-tetramethyl-2-indanylidene)benzyl]lithium discloses the stabilization of a vinylic carbanion by two lithium cations in a hydrocarbon milieu. Each lithium cation is in turn coordinated to two carbanion centers and additionally to one aromatic CC bond as well as to one CH bond of a methyl group. These bonding interactions result in an unsolvated trimer with pseudo-C3 symmetry. Moderate strain along the CC double bond can be discerned for the phenyl substituent in front of the rigid 1,1,3,3-tetramethyl-2-indanylidene moiety within each one of the monomeric subunits. (C20H21Li)3 crystallizes triclinic with Z = 2, space group P1BAR (No. 2), a = 12.854 (4) angstrom, b = 13.010 (4) angstrom, c = 16.011 (5) angstrom, alpha = 109.21 (2)-degrees, beta = 94.73 (3)-degrees, gamma = 92.52 (3)-degrees.

引用

页码：2669 / 2673

页数：5

共 33 条

[11] CRYSTAL-STRUCTURE OF TRIMERIC (2,6-DI-TERT-BUTOXYPHENYL)LITHIUM [J].