FORMATION OF OPTICALLY-ACTIVE [RU(BIPY)2CL2] (BIPY = 2,2'-BIPYRIDYL) BY PHOTODISSOCIATION OF [RU(BIPY)3]CL2 IN DICHLOROMETHANE

被引：17
|
作者：
YAMAGISHI, A
NAING, K
GOTO, Y
TANIGUCHI, M
TAKAHASHI, M
机构：
来源：
JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS | 1994年 / 14期
关键词：
D O I：
10.1039/dt9940002085
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
An optically active bis-chelated complex, [Ru(bipy)2Cl2] (bipy = 2,2'-bipyridyl), has been obtained when enantiomeric [Ru(bipy)3]Cl2 was illuminated by visible light in dichloromethane. From the dependence of the optical purity of the product on light intensity, it is proposed that the reaction from DELTA-[Ru(bipy)3]Cl2 to DELTA-[Ru(bipy)2Cl2] (Chirality retention) proceeds by way of the dissociation of a monodentate ligand, bipy*, from a photoactivated intermediate, DELTA-[Ru(bipy)2(bipy*)Cl]Cl in the dark, while the reaction to LAMBDA-[Ru(bipy)2Cl2] (chirality inversion) involves the further photoactivated configurational change of DELTA-[Ru(bipy)2(bipy*)Cl]Cl to LAMBDA-[Ru(bipy)2(bipy*)Cl]Cl. Racemization is avoided under the conditions of weak light and high temperature. The synthetic value of optically active [Ru(bipy)2Cl2] as a chiral intermediate has been exemplified by preparing a new chiral amphiphilic ruthenium(II) complex.
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页码：2085 / 2089
页数：5
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