New tricks for an old ligand: cyclometallated and didentate co-ordination of 2,2′ : 6′,2″-terpyridine to ruthenium(II)
- 1 January 1996
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 6,p. 873-878
- https://doi.org/10.1039/dt9960000873
Abstract
Monomethylation of 2,2′ : 6′,2″-terpyridine (terpy) afforded the N-methyl-2,2′ : 6′,2″-terpyridinium cation, [Hmterpy]+. With one of the terminal pyridine ring nitrogen atoms thus protected, it co-ordinates to ruthenium(II) either as a didentate N,N′-donor giving [Ru(terpy)(Hmterpy-N,N′)Cl][PF6]2, or as a cyclometallating terdentate ligand giving [Ru(terpy)(mterpy-N,N′,C)][PF6]2, depending upon the reaction conditions. Both complexes have been fully characterised by spectroscopic and electrochemical methods, and the crystal structures of [Ru(terpy)(mterpy-N,N′,C)][BF4]2·2MeCN and [Ru(terpy)(Hmterpy-N,N′)Cl][PF6]2·2MeCN determined.Keywords
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