Valence delocalization despite weak metal-metal coupling in a bis(organoosmium(III,II)) complex with a pyrazine bridge

被引：13

作者：

Glockle, M

Kaim, W

Fiedler, J

机构：

[1] Univ Stuttgart, Inst Anorgan Chem, D-70550 Stuttgart, Germany

[2] Acad Sci Czech Republ, J Heyrovsky Inst Phys Chem, CZ-18223 Prague, Czech Republic

来源：

ORGANOMETALLICS | 1998年 / 17卷 / 23期

关键词：

D O I：

10.1021/om980586m

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Carbonyl vibrational spectroelectrochemistry of {(mu-pz)[Os((PPr3)-Pr-i)(2)(CO)(H)Cl](2)}(0/+) in dichloromethane reveals valence delocalization of the mixed-valent state despite relatively weak metal-metal coupling, as evident from the comproportionation constant K-c = 10(4.3) and the intervalence charge-transfer band at 1705 nm (epsilon = 1250 M-1 cm(-1), Delta upsilon(1/2) = 3700 cm(-1)). The rather low charge and nonpolar medium, i.e., the absence of valence trapping by counterions or solvent molecules, favor this particular situation.

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收藏

页码：4923 / 4925

页数：3

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