Unusual trinuclear complex of copper(II) containing a 4′-(3-methyl-2-thienyl)-4,2′:6′,4″-terpyridine ligand. Structural, spectroscopic, electrochemical and magnetic properties
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Fecha
2017-11
Profesor/a Guía
Facultad/escuela
Idioma
en
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Título del volumen
Editor
Elsevier B.V.
Nombre de Curso
Licencia CC
CC BY-NC-ND 4.0 DEED
Licencia CC
https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
Resumen
We report the synthesis, characterization, crystal and molecular structure as well as the spectroscopic, electrochemical and magnetic properties of an unexpected trinuclear copper(II) complex (1), made of three Cu(2-TTA)2 units (2-TTA = 2-thenoyltrifluoroacetone) bridged by two 4'-(3-methyl-2-thienyl)-4,2′:6′,4″-terpyridine (4-stpy) ligands. The central Cu(II) atom shows an octahedral geometry, while the lateral metal centers present a slightly distorted square pyramidal coordination sphere. It is suggested that the introduction of the relatively bulky substituent groups (2-thienyl and [sbnd]CF3) in the 2-TTA ligand are responsible of this uncommon coordination mode. The magnetic behavior of 1 is reported in terms of a combination of monomer and dimer units, leading to weak antiferromagnetic interaction (J = −1.93 cm−1). The cyclovoltammogram of 1 exhibits, in the cathodic potential region, three redox events due to Cu2+/Cu+ and Cu+/Cu0 redox couples and to the mono-electronic reduction of the 4-stpy ligand. © 2017 Elsevier B.V.
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Indexación: Scopus
Palabras clave
2-Thenoyltrifluoroacetonate, 4,2′:6′,4″-Terpyridine, Copper(II) complex, Crystal structure, Cyclic voltammetry, Magnetic properties
Citación
Journal of Molecular Structure Volume 1146, Pages 213 - 22115 October 2017
DOI
10.1016/j.molstruc.2017.05.108