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A series of divalent ruthenium complexes of the type cis-[RuX phen2 py]2+ (phen = 1,10-phenanthroline, py = pyridine, X = py, Cl, Br, I, N3, NCS, NO2, CN, NH3, CH3CN), have been isolated and characterized. The cation cis-[Ru phen2 py2]2+ has been resolved into its optical isomers from which the optically active monosubstituted complexes have been prepared.
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Bosnich et al. (1966) studied this question.
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