Diastereoisomerically pure pyrazole-3,5-dicarboxylate-bridged dinuclear ruthenium(II) and osmium(II) complexes of 2,2'-bipyridine: structural, electrochemical and spectral studies
作者： Sujoy Baitalik , Pradip Bag , Ulrich Flörke , Kamalaksha Nag
DOI: 10.1016/J.ICA.2003.07.003
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摘要: Abstract Pyrazole-3,5-dicarboxylate-bridged dinuclear ruthenium(II) and osmium(II) complexes of 2,2′-bipyridine composition [(bpy)2Ru(pzdc)Ru(bpy)2](ClO4) · H2O (1) [(bpy)2Os(pzdc)Os(bpy)2](ClO4) · H2O (2) have been obtained in high yield separated to their homochiral (ΛΛ/ΔΔ) rac (1a, 2a) heterochiral (ΛΔ/ΔΛ) meso (1b, 2b) diastereoisomers. The distinctive structural features these diastereoisomers characterized by 1-D 2-D 1H NMR spectroscopy. X-ray crystal structure rac-[(bpy)2Os(pzdc)Os(bpy)2](ClO4) · H2O (2a) has determined. electrochemical electronic spectral studies established that there remain difference properties hence intermetallic communication between the diastereoisomeric forms each case.
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