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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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Article information


Submitted
18 Jul 2019
Accepted
24 Jul 2019
First published
26 Jul 2019

CrystEngComm, 2019,21, 4855-4858
Article type
Communication

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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