Journal article
Complexes of 2,4,6-trihydroxybenzoic acid: effects of intramolecular hydrogen bonding on ligand geometry and metal binding modes
BF Abrahams, CJ Commons, TA Hudson, RS Arlt, R Ahl, ED Carajias, JWK Chan, Z Guo, RE Hill, A McGinty, NL Peters, JYP Poon, J Qu, J Qu, EE Rochette, C Walkear, H Wang, H Wu, C Xu, J Zhang
Acta Crystallographica Section C Structural Chemistry | Published : 2022
Open access
Abstract
This article describes a series of more than 20 new compounds formed by the combination of 2,4,6-trihydroxybenzoic acid (H4thba) with metal ions in the presence of a base, with structures that include discrete molecular units, chains, and two- and three-dimensional networks. As a result of the presence of two ortho-hydroxy groups, H4thba is a relatively strong acid (pKa1 = 1.68). The carboxylate group in H3thba_ is therefore considerably less basic than most carboxylates with intramolecular hydrogen bonds, conferring a rigid planar geometry upon the anion. These characteristics of H3thba_ significantly impact upon the way it interacts with metal ions. In s-block metal compounds, where the in..
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Funding Acknowledgements
The authors gratefully acknowledge the support of staff and students of Scotch College Melbourne and Melbourne Girls' College. Open access publishing facilitated by The University of Melbourne, as part of the Wiley-The University of Melbourne agreement via the Council of Australian University Librarians.