Formation of Exceptionally Weak C–C Bonds by Metal-Templated Pinacol Coupling

Emma Folkertsma, Sanne H. Benthem, Léon Witteman, Christian A. M. R. Van Slagmaat, Martin Lutz, Robertus J.m. Klein Gebbink, Marc-etienne Moret*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review


The ability of the bis(imidazolyl)ketone ligand BMdiPhIK (bis(1-methyl-4,5-diphenylimidazolyl)ketone) to function as a redox active ligand has been investigated. The reduction of [M(BMdiPhIK)Cl2] (M = Fe and Zn) complexes resulted in a pinacol-type coupling to form dinuclear complexes featuring very weak and abnormally elongated C–C bonds (1.729(5) and 1.708(3) Å for Fe and Zn, respectively). Oxidation of these complexes using ferrocenium in the presence of Cl− ions regenerated the original [M(BMdiPhIK)Cl2] complexes, showing the reversibility of the coupling process. This makes it a potentially interesting approach for the storage of electrons and application of the BMdiPhIK ligand as a redox active ligand.

Graphical abstract: Formation of exceptionally weak C–C bonds by metal-templated pinacol coupling
Original languageEnglish
Pages (from-to)6177-6182
Number of pages6
JournalDalton Transactions
Issue number19
Publication statusPublished - 10 Apr 2017


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