The methanol-methanolate CH3OH•••OCH3- bridging ligand:: Tuning of exchange coupling by hydrogen bonds in dimethoxo-bridged dichromium(III) complexes

被引：46

作者：

Paine, TK ^{[1
]}

Weyhermuller, T ^{[1
]}

Wieghardt, K ^{[1
]}

Chaudhuri, P ^{[1
]}

机构：

[1] Max Planck Inst Strahlenchem, D-45470 Mulheim, Germany

来源：

INORGANIC CHEMISTRY | 2002年 / 41卷 / 25期

关键词：

D O I：

10.1021/ic0204068

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Two bis(mu-methoxo)dichromium(III) complexes, [(L2Cr2)-Cr-Se(mu-OCH3)(2)(CH3OH)(2)] 1 and [(L2Cr2)-Cr-Se(mu-OCH3)(2)(CH3OH)(CH3O)](-) 2, where L-Se represents the dianion of 2,2'-selenobis(4,6-di-tertbutylphenol), have been reported to demonstrate the effect of hydrogen bonding on the exchange coupling interactions between the chromium(Ill) centers. The corresponding sulfur analogue of the ligand, i.e., 2,2'-thiobis(4,6-di-tert-butylphenol), also yields the analogous [(L2Cr2)-Cr-S(Umu-OCH3)(2)(CH3OH)(2)] 3 and [(L2Cr2)-Cr-S(mu-OCH3)(2)(CH3O)(CH3OH)](-) 4, which exhibit similar exchange coupling parameters. An acid-base dependent equilibrium between I and 2 or 3 and 4 has been established by electronic spectral measurements.

引用

页码：6538 / 6540

页数：3

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