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Issue 29, 2018
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What's in a name? ‘Coinage-metal’ non-covalent bonds and their definition

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Abstract

Many complexes of the type B⋯MX, (where B is a Lewis base such as H2, N2, ethyne, ethene, cyclopropane, H2O, H2S, PH3, or NH3, M is a coinage-metal atom Cu, Ag or Au, and X is a halogen atom) have now been characterised in the gas phase through their rotational spectra. It is pointed out that, for a given B, such complexes have angular geometries that are isomorphous with those of their hydrogen- and halogen-bonded counterparts B⋯HX and B⋯XY, respectively. Since the MX are, like the B, HX and XY referred to, closed-shell molecules, the complexes B⋯MX also involve a non-covalent bond. Therefore, the name ‘coinage-metal’ bond is suggested for the non-covalent interaction in B⋯MX, by analogy with hydrogen and halogen bonds. A generalised definition that covers all non-covalent bonds is also presented.

Graphical abstract: What's in a name? ‘Coinage-metal’ non-covalent bonds and their definition

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Publication details

The article was received on 30 May 2018, accepted on 02 Jul 2018 and first published on 02 Jul 2018


Article type: Perspective
DOI: 10.1039/C8CP03432J
Citation: Phys. Chem. Chem. Phys., 2018,20, 19332-19338
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    What's in a name? ‘Coinage-metal’ non-covalent bonds and their definition

    A. C. Legon and N. R. Walker, Phys. Chem. Chem. Phys., 2018, 20, 19332
    DOI: 10.1039/C8CP03432J

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