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Z. Naturforsch. 2014,
69b, 1248 – 1252
doi:10.5560/ZNB.2014-4194
Digold(I) Complexes Derived from 5,5′-Bibenzimidazolin-2-ylidene Ligands
Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstraße 30, D-48149 Münster, Germany
Reprint requests to Prof. Dr. F. E. Hahn. Fax: +49 251 8333108. E-mail:
fehahn@uni-muenster.de
Received August 14, 2014 / published online December 19, 2014
Dedicated to Professor Hubert Schmidbaur on the occasion of his 80th birthday
The 5,5′-bibenzimidazolium dibromide salts 2 and 3 have been prepared by fourfold N-alkylation of 5,5′-bibenzimidazole (2: R = Pr; 3: R = Bu). The diazolium salts were treated with silver oxide, and the in situ-formed silver complexes were subsequently reacted with [AuCl(SMe2)] to give the dinuclear gold complexes 4 and 5. The molecular structure of complex 5 has been determined by X-ray diffraction showing linearly coordinated gold(I) centers and, most likely due to steric crowding around the metal centers, no aurophilic interactions.
Key words: N-Heterocyclic Carbene, Gold, X-Ray Diffraction