Ruthenium(II) complexes of multidentate ligands derived from di(2-pyridyl)methane

D'Alessandro, Deanna M., Keene, F. Richard, Steel, Peter J., and Sumby, Christopher J. (2003) Ruthenium(II) complexes of multidentate ligands derived from di(2-pyridyl)methane. Australian Journal of Chemistry, 56 (7). pp. 657-664.

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Abstract

Bis(2,2′-bipyridyl)ruthenium complexes of the model ligand di(2-pyridyl)methane (1) and its multidentate derivatives 1,1,2,2-tetra(2-pyridyl)ethane (2), tetra(2-pyridyl)ethene (3), and hexa(2-pyridyl)[3]radialene (4) have been prepared and characterized by NMR, visible absorption spectroscopy, electrochemical measurements, and, in two cases, by X-ray crystallography. Complexes of (2) and (3) exist as conformationally rigid species with lower than expected symmetry. Ligands (2) and (3) proved surprisingly resistant to forming dinuclear ruthenium complexes. The two diastereoisomeric dinuclear complexes of (4), Δ Λ/Λ Δ and Δ Δ/Λ Λ (rac), are shown to be locked in conformations of C1 and C2 point-group symmetry, respectively. This represents a rare example where the Δ Λ/Λ Δ-dinuclear complex of a achiral, symmetrically bridging ligand is not a meso compound.

Item ID: 4434
Item Type: Article (Research - C1)
ISSN: 1445-0038
Keywords: ruthenium; stereochemistry; syntheis; X-ray crystallography
Date Deposited: 16 Jun 2009 02:21
SEO Codes: 97 EXPANDING KNOWLEDGE > 970103 Expanding Knowledge in the Chemical Sciences @ 100%
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