Abstract

Ruthenium(II) nitrosyl complexes with pyridine-functionalized N-heterocyclic carbenes [(L)Ru(NO)Cl3] [L = 3-tert-butyl-1-(2-pyridyl)imidazol-2-ylidene, 2a; 3-n-butyl-1-(2-pyridyl)imidazol-2-ylidene, 2b; 3-tert-butyl-1-picolylimidazol-2-ylidene, 2c; 3-n-butyl-1-picolylimidazol-2-ylidene, 2d; and 3-benzyl-1-picolylimidazol-2-ylidene, 2e] have been prepared by transmetalation from the corresponding silver carbene complexes. Compounds 2a−c have been characterized by single-crystal X-ray crystallography. Compounds 2a−e show catalytic activities in transfer hydrogenation of ketones.

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