Antielectrostatically hydrogen bonded anion dimers: counter-intuitive, common and consistent. Issue 33 (26th July 2019)

• Record Type: Journal Article
• Authors: White, Nicholas G.
• Is Part Of: CrystEngComm. Volume 21:Issue 33(2019)
• Page Start: 4855
• Page End: 4858
• Publication Date: 2019-07-26
• Subjects: Crystals -- Periodicals; Crystal growth -- Periodicals; Crystallography -- Periodicals; Cristaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Cristallographie -- Périodiques; 548
• DOI: 10.1039/c9ce01118h
• Languages: English
• ISSNs: 1466-8033

Abstract

Abstract : A Cambridge Structural Database survey reveals that antielectrostatically hydrogen bonded dimers occur frequently between a wide range of anions. 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.