Unusual dimer formation of cyclometalated ruthenium NHC p-cymene complexes

Schleicher, David; Tronnier, Alexander; Leopold, Hendrik; Borrmann, Horst; Strassner, Thomas

doi:10.1039/c6dt00100a

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Unusual dimer formation of cyclometalated ruthenium NHC p-cymene complexes

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Borrmann, Horst
Horst Borrmann, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Schleicher, D., Tronnier, A., Leopold, H., Borrmann, H., & Strassner, T. (2016). Unusual dimer formation of cyclometalated ruthenium NHC p-cymene complexes. Dalton Transactions, 45(8), 3260-3263. doi:10.1039/c6dt00100a.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002A-2D7C-E

Abstract

We present the synthesis and structural characterization of novel ruthenium complexes containing C boolean AND C* cyclometalated N-heterocyclic carbene ligands, eta(6)-arene (p-cymene) ligands and one bridging chlorine ion. Complexes of the general formula [Ru(p-cymene)(C boolean AND C*)Cl] were prepared via a one-pot synthesis using in situ transmetalation from the correspondent silver NHC complexes. These complexes react with sodium tetrakis[3,5-bis(trifluoromethyl)phenyl] borate (NaBAr4F) to form dinuclear complexes of the general structure [Ru(p-cymene)(C boolean AND C*)-mu-Cl-(p-cymene)-(C boolean AND C*) Ru](+)[BAr4F](-). Solid-state structures confirm that the pseudo-tetrahedral coordination around the metal center with the eta(6)-ligand aligned perpendicularly to the C boolean AND C* ligand and the i-Pr group "atop" is retained in the bimetallic complexes.