Bulletin of the Chemical Society of Japan
Online ISSN : 1348-0634
Print ISSN : 0009-2673
ISSN-L : 0009-2673
Syntheses of Geometrical Isomers for Comparison of Properties Caused by Steric and Electronic Effects in Carbonylruthenium(II) Complexes
Dai OyamaKazumi YuzuriyaRyutaro NaoiTakashi HamadaTsugiko Takase
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2014 Volume 87 Issue 10 Pages 1107-1115


Both stereoisomers of the novel ruthenium complex [Ru(tpy)(pynp)(CO)]2+ containing 2,2′:6′,2′′-terpyridine (tpy), a terminal carbonyl, and the unsymmetrical bidentate naphthyridine ligand 2-(2-pyridyl)-1,8-naphthyridine (pynp) were selectively synthesized. In addition, two more ruthenium complexes [Ru(ptpy)(pynp)(CO)]2+ containing 4′-phenyl-2,2′:6′,2′′-terpyridine (ptpy) instead of tpy were also prepared. These complexes were fully characterized and their molecular structures were determined by X-ray crystallography. Some obvious differences between the isomers were revealed by the structural, computational, and spectroscopic results. Furthermore, redox properties and carbonyl ligand-based reactions of these four complexes were examined to evaluate the steric and electronic effects of the other ligands on the carbonyl reactivity. Both effects, based on the structural differences, exerted a large influence on the reactivity.

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© 2014 The Chemical Society of Japan
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