Isolation of Geometric Isomers within Diastereoisomers of Dinuclear Ligand-Bridged Complexes of Ruthenium(II)
1998; American Chemical Society; Volume: 37; Issue: 4 Linguagem: Inglês
10.1021/ic971080j
ISSN1520-510X
AutoresBradley T. Patterson, F. Richard Keene,
Tópico(s)Magnetism in coordination complexes
ResumoThe individual diastereoisomeric forms [meso (ΔΛ) and rac (ΔΔ and ΛΛ)] of the ligand-bridged dinuclear species [{Ru(phen)(Me4bpy)}2(μ-bpm)]4+ [phen = 1,10-phenanthroline; Me4bpy = 4,4',5,5'-tetramethyl-2,2'-bipyridine; bpm = 2,2'-bipyrimidine] have been synthesized using chiral forms of the precursors [Ru(phen)(Me4bpy)(bpm)]2+ and [Ru(phen)(Me4bpy)(py)2]2+. The cis and trans geometric isomers of both diastereoisomeric forms have been separated by cation exchange chromatography and characterized by NMR spectroscopy. We also report the first chiral resolutions of a heteroleptic tris(bidentate)ruthenium(II) complex, [Ru(phen)(Me4bpy)(bpm)]2+, and a heteroleptic bis(bidentate)bis(pyridine)ruthenium(II) complex, [Ru(phen)(Me4bpy)(py)2]2+, in both cases using cation exchange chromatography.
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