Isolation of bis- and mono-cyclometallated Ru−IMes complexes upon reaction of [Ru(PPh3)3HCl], IMes and ZnMe2

Addition of an excess of ZnMe2 to a mixture of [Ru(PPh3)3HCl] and IMes (IMes=1,3-bis(2,4,6-trimethylphenyl)imidazolin-2-ylidene) yields the bis-cyclometallated complex, [Ru(IMes)“(PPh3)2] 2, together with the mono-cyclometallated, Ru−Zn heterobimetallic complex [Ru(IMes)′(PPh3)2(ZnMe)] 3. Treatment...

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Detalhes bibliográficos
Autores: Pécharman, Anne-Frédérique M., Roberts, Erika M., Miloserdov, Fedor M., Varela-Izquierdo, Víctor, Mahon, Mary F., Whittlesey, Michael K.
Tipo de documento: artigo
Estado:Versão publicada
Data de publicação:2023
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositório:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/334717
Acesso em linha:http://hdl.handle.net/10261/334717
Access Level:Acceso aberto
Descrição
Resumo:Addition of an excess of ZnMe2 to a mixture of [Ru(PPh3)3HCl] and IMes (IMes=1,3-bis(2,4,6-trimethylphenyl)imidazolin-2-ylidene) yields the bis-cyclometallated complex, [Ru(IMes)“(PPh3)2] 2, together with the mono-cyclometallated, Ru−Zn heterobimetallic complex [Ru(IMes)′(PPh3)2(ZnMe)] 3. Treatment of 2 with H2, PhSiH3 or pinacolborane yields the previously reported complex, [Ru(IMes)′(PPh3)2H] 1, the synthesis of which has been reinvestigated. Further studies of small molecule reactivity show that 1 adds H2 to give [Ru(IMes)(PPh3)2H4] 4, whilst 2 reacts with catecholborane to give [Ru(IMes-Bcat)′(PPh3)2H] 5, in which (IMes-Bcat)′ signifies a borylated NHC ligand that is singly-metallated onto Ru. Treatment of 2 with CO gives the 18-electron dicarbonyl product [Ru(IMes)”(PPh3)(CO)2] 6. Compounds 1–3, 5 and 6 have been structurally characterised.

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