Complexes of 2,4,6-trihydroxybenzoic acid: effects of intramolecular hydrogen bonding on ligand geometry and metal binding modes.

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 (pK_a1 = 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 interaction of the metal

SUBMITTER: Abrahams BF 

PROVIDER: S-EPMC9635592 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature