'Pincer’ pyridyl- and bipyridyl-N-heterocyclic carbene analogues of the Grubbs’ metathesis catalyst

Wright, Joseph A., Danopoulos, Andreas A., Motherwell, William B., Carroll, Robert J. and Ellwood, Simon (2006) 'Pincer’ pyridyl- and bipyridyl-N-heterocyclic carbene analogues of the Grubbs’ metathesis catalyst. Journal of Organometallic Chemistry, 691 (24-25), 5204-5210. (doi:10.1016/j.jorganchem.2006.08.023).

Abstract

The ‘pincer’ pyridine-dicarbene and bipyridyl-carbene ruthenium benzylidene complexes, Ru(C–N–C)Cl2(@CHPh) and Ru(C–N– N)Cl2(@CHPh), (C–N–C) = 2,6-bis(DiPP-imidazol-2-ylidene)pyridine, (C–N–N) = (DiPP-imidazol-2-ylidene)bipyridine, have been prepared and characterised by spectroscopic and diffraction methods. They exhibit moderate metathesis activity. Non-symmetrical linear tridentate ether-functionalised N-heterocyclic carbene pro-ligands are also described.

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