Synthetic and stereochemical studies of dinuclear ruthenium(II) complexes with mixed terminal ligands

Patterson, Bradley T., Foley, Fiona M., Richards, Dean, and Keene, F. Richard (2003) Synthetic and stereochemical studies of dinuclear ruthenium(II) complexes with mixed terminal ligands. Dalton Transactions, 2003 (4). pp. 709-714.

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Abstract

The dinuclear ligand-bridged complex systems [{Ru(bpy)2}(μ-bpm)(Ru(Me2bpy)2}]4+ and [{Ru(bpy)(Me2bpy)}2-(μ-bpm)]4+ (bpm = 2,2'-bipyrimidine; bpy = 2,2'-bipyridine; Me2bpy = 4,4'-dimethyl-2,2'-bipyridine) exhibit a range of stereoisomers - diastereoisomers, enantiomers and geometric isomers. From synthetic procedures producing mixtures of all possible forms of the respective complexes, the four stereoisomeric forms of the [(Ru(bpy)2}(μ-bpm)( Ru(Me2bpy)2)]4+ (viz. AA, ΔΔ, AA and AA) and the six stereoisomeric forms of [{Ru(bpy)(Me2bpyl}2-(μ-bpm)]4+ (viz. ΔΔ-trans, ΔΔ-cis, ΔΔ-trans, ΔΔ-cis, AA-trans, and AA-cis) have been isolated using cation-exchange chromatographic techniques. This is the first reported separation of the stereoisomers for a system of the type [{Ru(pp)2}(μ-bpm){Ru(pp')2}]4+ (pp and pp' = bidentate polypyridyl ligands; pp ≠ pp').

Item ID: 4433
Item Type: Article (Refereed Research - C1)
Keywords: dinuclear; ruthenium; stereochemistry; synthesis
ISSN: 1477-9234
Date Deposited: 11 Jun 2009 01:15
SEO Codes: 97 EXPANDING KNOWLEDGE > 970103 Expanding Knowledge in the Chemical Sciences @ 100%
Citation Count from Web of Science Web of Science 9
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