Coordination chemistry of 3- and 4-mercaptobenzoate ligands: Versatile hydrogen-bonding isomers of the thiosalicylate (2-mercaptobenzoate) ligand

Tiekink, Edward R. T. * and Henderson, William (2017) Coordination chemistry of 3- and 4-mercaptobenzoate ligands: Versatile hydrogen-bonding isomers of the thiosalicylate (2-mercaptobenzoate) ligand. Coordination Chemistry Reviews, 341. pp. 19-52. ISSN 00108545

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Official URL: http://dx.doi.org/10.1016/j.ccr.2017.03.025

Abstract

This review summarises the coordination chemistry of the isomeric 3- and 4-mercaptobenzoate ligands, derived from HSC6H4COOH, being isomers of the widely-studied 2-mercaptobenzoate (thiosalicylate) ligand. The 3- and 4-mercaptobenzoate ligands show a wide range of coordination modes, including monodentate (through either S or less commonly O), chelation through the carboxylate group alone, as well as a wide range of bridging modes. However, S,O-chelation, which is prevalent for thiosalicylate complexes, is not found in the 3MBA and 4MBA isomers. In the solid-state, complexes of 3MBA and 4MBA ligands containing protonated carboxylic acid groups typically undergo aggregation through formation of classical hydrogen-bonded carboxylic acid dimer motifs, which can be supplemented by additional interactions such as aurophilic (Au� � �Au) interactions in the case of gold(I) complexes. The hybrid hard-soft nature of 3MBA and 4MBA ligands facilitates the use of these ligands in the construction of early-late heterobimetallic complexes. These ligands also find numerous applications (such as the protection of metallic gold and silver nanoparticles), which are especially prevalent for 4MBA where the para carboxylate/carboxylic acid group is remote from the sulfur coordination site.

Item Type: Article
Additional Information: First author is with Research Centre for Crystalline Materials, School of Science and Technology, Sunway University; 2nd author is with Chemistry, School of Science, University of Waikato
Uncontrolled Keywords: mercaptobenzoate; thiolate ligand; carboxylate ligand; complexes Structures Hydrogen-bonding
Subjects: Q Science > QD Chemistry
Divisions: Others > Non Sunway Academics
Sunway University > School of Science and Technology > Research Centre for Crystalline Materials
Depositing User: Ms. Molly Chuah
Date Deposited: 24 Oct 2017 07:37
Last Modified: 13 Feb 2018 09:42
URI: http://eprints.sunway.edu.my/id/eprint/613

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