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Issue 33, 2019
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Antielectrostatically hydrogen bonded anion dimers: counter-intuitive, common and consistent

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Abstract

The Cambridge Structural Database was surveyed for antielectrostatically hydrogen bonded anion complexes. The survey revealed that these complexes are relatively common, e.g. half of all structurally characterised bicarbonate anions are present as dimers. Generally, the bonding is surprisingly homogenous with O⋯O contacts close to 2.6 Å for all anions. Distances are similar in length to, or slightly shorter than, those in carboxylic acid dimers, which do not have to contend with Coulombic repulsion. A heteroanion complex was identified as well as a small number of “highly antielectrostatic” dimers formed between two 2 anions.

Graphical abstract: Antielectrostatically hydrogen bonded anion dimers: counter-intuitive, common and consistent

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Publication details

The article was received on 18 Jul 2019, accepted on 24 Jul 2019 and first published on 26 Jul 2019


Article type: Communication
DOI: 10.1039/C9CE01118H
CrystEngComm, 2019,21, 4855-4858

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    Antielectrostatically hydrogen bonded anion dimers: counter-intuitive, common and consistent

    N. G. White, CrystEngComm, 2019, 21, 4855
    DOI: 10.1039/C9CE01118H

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