‘Pincer’ pyridyl- and bipyridyl-N-heterocyclic carbene analogues of the Grubbs’ metathesis catalyst
2006
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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