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DOI: 10.1039/A901696A (Paper) Reference Section for: J. Chem. Soc., Dalton Trans., 1999, 1373-1374

A singly stranded, helical di-ruthenium(II) complex of a novel 6,6-ethynyl-linked bis(terpyridine) ligand. Distortion of the ethyne linkage and inversion of helicity

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Charles M. Chamchoumis and Pierre G. Potvin

Abstract

The new, ethynyl-bridged ditopic ligand, 1,2-bis[4′-(4-methylphenyl)-2,2′∶6′2′′-terpyridin-6-yl]ethyne (L) was prepared and used in the formation of the helical dinclear complex [L{Ru(ttpy)}2][PF6]4 (ttpy=4′-(4-methylphenyl)-2,2′∶6′,2′′-terpyridine), whose crystal structure exhibits pronounced bending of the central ethynyl bridge and whose solution NMR spectra indicate a rapid inversion of helicity at 335 K.

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