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Issue 13, 2019
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Heterobimetallic ruthenium–zinc complexes with bulky N-heterocyclic carbenes: syntheses, structures and reactivity

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Abstract

The ruthenium–zinc heterobimetallic complexes, [Ru(IPr)2(CO)ZnMe][BArF4] (7), [Ru(IBiox6)2(CO)(THF)ZnMe][BArF4] (12) and [Ru(IMes)′(PPh3)(CO)ZnMe] (15), have been prepared by reaction of ZnMe2 with the ruthenium N-heterocyclic carbene complexes [Ru(IPr)2(CO)H][BArF4] (1), [Ru(IBiox6)2(CO)(THF)H][BArF4] (11) and [Ru(IMes)(PPh3)(CO)HCl] respectively. 7 shows clean reactivity towards H2, yielding [Ru(IPr)2(CO)(η2-H2)(H)2ZnMe][BArF4] (8), which undergoes loss of the coordinated dihydrogen ligand upon application of vacuum to form [Ru(IPr)2(CO)(H)2ZnMe][BArF4] (9). In contrast, addition of H2 to 12 gave only a mixture of products. The tetramethyl IBiox complex [Ru(IBioxMe4)2(CO)(THF)H][BArF4] (14) failed to give any isolable Ru–Zn containing species upon reaction with ZnMe2. The cyclometallated NHC complex [Ru(IMes)′(PPh3)(CO)ZnMe] (15) added H2 across the Ru–Zn bond both in solution and in the solid-state to afford [Ru(IMes)′(PPh3)(CO)(H)2ZnMe] (17), with retention of the cyclometallation.

Graphical abstract: Heterobimetallic ruthenium–zinc complexes with bulky N-heterocyclic carbenes: syntheses, structures and reactivity

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Article information


Submitted
20 Dec 2018
Accepted
19 Feb 2019
First published
19 Feb 2019

This article is Open Access

Dalton Trans., 2019,48, 4176-4189
Article type
Paper

Heterobimetallic ruthenium–zinc complexes with bulky N-heterocyclic carbenes: syntheses, structures and reactivity

M. Espinal-Viguri, V. Varela-Izquierdo, F. M. Miloserdov, I. M. Riddlestone, M. F. Mahon and M. K. Whittlesey, Dalton Trans., 2019, 48, 4176
DOI: 10.1039/C8DT05023F

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