Protonation of Platinum(II) Dialkyl Complexes Containing Ligands with Proximate H-Bonding Substituents

The possibility of activating C−H bonds at a platinum(II) center that contains a ligand with a proximate H-bonding functionality, for example a NH2 substituent, has been investigated. A series of platinum(II) dimethyl complexes [Pt(L)Me2], where L is an unsymmetrically substituted bipyridine ligand,...

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Bibliographic Details
Published in:Organometallics 2006-04, Vol.25 (8), p.2074-2079
Main Authors: Britovsek, George J. P, Taylor, Russell A, Sunley, Glenn J, Law, David J, White, Andrew J. P
Format: Article
Language:English
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Summary:The possibility of activating C−H bonds at a platinum(II) center that contains a ligand with a proximate H-bonding functionality, for example a NH2 substituent, has been investigated. A series of platinum(II) dimethyl complexes [Pt(L)Me2], where L is an unsymmetrically substituted bipyridine ligand, has been prepared. Protonation reactions in acetonitrile with 1 equiv of a strong acid generate cationic complexes of the type [Pt(L)Me(CH3CN)]+. The selectivity of the protonation reactions appears to be governed by steric effects rather than H-bonding effects. This is believed to be the result of the low basicity of the amino subsituent in 2-amino pyridines.
ISSN:0276-7333
1520-6041
DOI:10.1021/om060036l