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Issue 28, 2010
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The halogen bond: an interim perspective

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There has been an upsurge of interest in the halogen bond during the last decade. This non-covalent interaction is less familiar than the hydrogen bond, but is similar to it in several respects. In this article, we first discuss the nature of the halogen bond in the gas phase, as established by systematic investigations of the rotational spectra of complexes BXY, where B is a simple Lewis base and XY is a dihalogen molecule. The geometry of a given BXY is found to be isomorphic with that of the corresponding hydrogen-bonded system BHX, an observation that leads an interim definition of the halogen bond similar to that recently proposed for the hydrogen bond. Selected novel applications of the halogen bond made in the last decade in various areas of chemistry/materials (namely crystal engineering, liquid crystals, nano-materials, polymer chemistry and inorganic chemistry) are then reviewed. These applications generally involve molecules of the type XR (where R is an electron-withdrawing group) acting as the electron donor, rather than dihalogens XY.

Graphical abstract: The halogen bond: an interim perspective

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Publication details

The article was received on 01 Feb 2010, accepted on 14 Apr 2010 and first published on 21 May 2010

Article type: Perspective
DOI: 10.1039/C002129F
Citation: Phys. Chem. Chem. Phys., 2010,12, 7736-7747

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    The halogen bond: an interim perspective

    A. C. Legon, Phys. Chem. Chem. Phys., 2010, 12, 7736
    DOI: 10.1039/C002129F

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