Synthesis and characterisation of chelated cationic ReI(CO)3bis(NHC)(WCA) complexes

Sebastian J. Hock; Lars-Arne Schaper; Alexander Pöthig; Markus Drees; Eberhardt Herdtweck; Oliver Hiltner; Wolfgang A. Herrmann; Fritz E. Kühn

doi:10.1039/C3DT52605D

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Synthesis and characterisation of chelated cationic Re^I(CO)₃bis(NHC)(WCA) complexes†

Sebastian J. Hock,^a Lars-Arne Schaper,^a Alexander Pöthig,^a Markus Drees,^a Eberhardt Herdtweck,^a Oliver Hiltner,^a Wolfgang A. Herrmann*^a and Fritz E. Kühn*^a

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* Corresponding authors

^a Chair of Inorganic Chemistry/Molecular Catalysis, Catalysis Research Center, Technische Universität München, Ernst-Otto-Fischer-Str. 1, D-85747 Garching, Germany
E-mail: wolfgangherrmann@ch.tum.de, fritz.kuehn@ch.tum.de
Fax: +49 89 289 13473

Abstract

Twelve novel Re(I) acetonitrile complexes of the type [Re(CO)₃(L)(MeCN)][WCA], with L being a chelating bis(NHC) ligand with alkylene-bridged and N-substituted bis(imidazolineylidene) moieties, and WCA (WCA = weakly coordinating anion) representing PF₆⁻ and [Al(OC(CF₃)₃)₄]⁻, have been synthesized. 1D and 2D NMR spectroscopy as well as IR spectroscopy, elemental analysis and X-ray crystallography have been applied in characterization. The propylene-bridged complex, displaying mesitylene groups R, is discussed in depth revealing interesting chemical behaviour both in solid state and in solution. DFT calculations were undertaken to better understand the properties of such compounds. In addition, the X-ray molecular structure of the first rhenium CCC pincer complex is reported.

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DOI: https://doi.org/10.1039/C3DT52605D
Article type: Paper
Submitted: 20 Sep 2013
Accepted: 21 Nov 2013
First published: 03 Dec 2013

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Dalton Trans., 2014,43, 2259-2271

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Synthesis and characterisation of chelated cationic Re^I(CO)₃bis(NHC)(WCA) complexes

S. J. Hock, L. Schaper, A. Pöthig, M. Drees, E. Herdtweck, O. Hiltner, W. A. Herrmann and F. E. Kühn, Dalton Trans., 2014, 43, 2259 DOI: 10.1039/C3DT52605D

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Dalton Transactions