Issue 27, 2016

Carving a 1D CoII-carboranylcarboxylate system by using organic solvents to create stable trinuclear molecular analogues: complete structural and magnetic studies

Abstract

This work presents a straightforward methodology to achieve small linear trinuclear molecules based on the CoII-carboranylcarboxylate system obtained by carving a 1D polynuclear analogous system with the use of diethylether. The reaction of the carboranylcarboxylic ligand, 1-CH3-2-CO2H-1,2-closo-C2B10H10 (LH) with different cobalt salts leads to the polynuclear compound [Co2(μ-H2O)(1-CH3-2-CO2-1,2-closo-C2B10H10)4(THF)4], 1 and the polymeric [Co(μ-H2O)(1-CH3-2-CO2-1,2-closo-C2B10H10)2]n(H2O)n2. This latter 1D chain has been obtained by an unprecedented synthetic strategy for the isolation of cobalt(II) compounds. [Co3(μ-H2O)2(1-CH3-2-CO2-1,2-closo-C2B10H10)6(H2O)2(C4H10O)2], 3 is formed by the dissociation of the polymeric structure that forms 2 when a mild coordinating solvent such as diethylether is added. These compounds have been characterized by analytical and spectroscopic techniques. X-ray analysis of 1 and 3 revealed that 1 presents a dinuclear structure whereas 3 is trinuclear; in both cases a six-coordinated CoII compound with water molecules bridging each of the two CoII centres has been observed. The magnetic properties of 1 and 3 show a weak antiferromagnetic behaviour, respectively, between the CoII centres mediated by two carboxylate ligands and a molecule of water.

Graphical abstract: Carving a 1D CoII-carboranylcarboxylate system by using organic solvents to create stable trinuclear molecular analogues: complete structural and magnetic studies

Supplementary files

Article information

Article type
Paper
Submitted
04 May 2016
Accepted
02 Jun 2016
First published
02 Jun 2016
This article is Open Access
Creative Commons BY-NC license

Dalton Trans., 2016,45, 10916-10927

Carving a 1D CoII-carboranylcarboxylate system by using organic solvents to create stable trinuclear molecular analogues: complete structural and magnetic studies

M. Fontanet, M. Rodríguez, X. Fontrodona, I. Romero, F. Teixidor, C. Viñas and N. Aliaga-Alcalde, Dalton Trans., 2016, 45, 10916 DOI: 10.1039/C6DT01744D

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