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Quantitative Selection of the Axially Chiral Conformation in a Flexible Dinuclear Gold(I) di(N-Heterocyclic Carbene) Complex via Chlorine Oxidative Addition

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Abstract

A novel dinuclear gold(II) complex with two-fold rotational symmetry 2 of general formula [Au2Cl2(diNHC)2](PF6)2 (diNHC=di(N-heterocyclic carbene)) has been obtained in quantitative yield via chlorine (in the form of PhICl2) oxidative addition to the parent gold(I) complex 1 [Au2(diNHC)2](PF6)2. The novel compound has been characterized by 1H and 13C NMR and single crystal x-ray structure analysis. The oxidation of the two gold(I) centres to gold(II), with the formation of a covalent bond between them, imposes to the complex an axis of chirality, along the Au–Au bond, leading to a chiral propeller arrangement.

Graphical Abstract

Structural characterization of a novel dinuclear gold(II) complex with di(N-heterocyclic carbene) ligands, the formation of the gold(II)-gold(II) bond imposes to the complex coordination chirality.

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Authors and Affiliations

  1. Dipartimento Di Scienze Chimiche, Università Degli Studi Di Padova, Via F. Marzolo 1, 35131, Padova, Italy

    Marco Baron, Lidia Armelao & Cristina Tubaro

  2. Institute of Condensed Matter Chemistry and Technologies for Energy (ICMATE), National Research Council (CNR), Via F. Marzolo 1, 35131, Padova, Italy

    Marzio Rancan, Lidia Armelao & Cristina Tubaro

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Baron, M., Rancan, M., Armelao, L. et al. Quantitative Selection of the Axially Chiral Conformation in a Flexible Dinuclear Gold(I) di(N-Heterocyclic Carbene) Complex via Chlorine Oxidative Addition. J Chem Crystallogr 51, 175–182 (2021). https://doi.org/10.1007/s10870-020-00840-7

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