Abstract
Two open-chain and closed-crown ether-substituted binuclear ruthenium vinyl complexes (E,E)-[{(PMe3)3-(CO)ClRu}2(μ-HC=CH–Ar–CH = CH)], in which the 1,4-diethenylphenylene bridge bears two different crown groups at the 2,3-positions, have been prepared and characterized by spectroscopic methods and by cyclic voltammetry. In addition, the X-ray crystal structure of complex 7a was determined. The electrochemical studies showed that both complexes undergo two successive one-electron oxidation processes, and the closed-crown complex better stabilized the mixed valence bimetallic ruthenium complex.
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