A highly reduced V23+ unit with a metal-metal bond order of 3.5

被引：23

作者：

Cotton, FA

Hillard, EA

Murillo, CA

机构：

[1] Texas A&M Univ, Dept Chem, College Stn, TX 77842 USA

[2] Texas A&M Univ, Mol Struct & Bonding Lab, College Stn, TX 77842 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2003年 / 125卷 / 08期

关键词：

D O I：

10.1021/ja029792i

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report the isolation and structural characterization of the first four-bladed paddlewheel complex having an M23+ core in K(THF)3[V2(DPhF)4], where DPhF is the anion of N,N-diphenylformamidine. This dark green, paramagnetic compound was obtained by reduction of diamagnetic, triply bonded V2(DPhF)4 with KC8. The V-V bond distance in K(THF)3[V2(DPhF)4] is 1.9295(8) Å, 0.05 Å shorter than that found in the V24+ species. The shortening of the bond, combined with a 15-line hyperfine splitting pattern in the EPR spectrum of K(THF)3[V2(DPhF)4], indicates that the unpaired electron is delocalized over the two vanadium atoms, giving rise to a bond order of 3.5. Copyright © 2003 American Chemical Society.

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页码：2026 / 2027

页数：2

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