Trinuclear Mo3S7 Clusters Coordinated to Dithiolate or Diselenolate Ligands and Their Use in the Preparation of Magnetic Single Component Molecular Conductors
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Otros documentos de la autoría: Llusar, Rosa; Triguero Bascuñán, Sonia; Polo Ortiz, Victoriano; Vicent Barrera, Cristian; Gómez García, Carlos J.; Jeannin, Olivier; Fourmigué, Marc
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http://dx.doi.org/10.1021/ic8009546 |
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Título
Trinuclear Mo3S7 Clusters Coordinated to Dithiolate or Diselenolate Ligands and Their Use in the Preparation of Magnetic Single Component Molecular ConductorsAutoría
Fecha de publicación
2008-09Editor
American Chemical SocietyISSN
0020-1669Cita bibliográfica
Inorganic Chemistry, 47, 2, p. 9400-9409Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
http://pubs.acs.org/doi/abs/10.1021/ic8009546Versión
info:eu-repo/semantics/publishedVersionResumen
A general route for the preparation of a series of dianionic Mo3S7 cluster complexes bearing dithiolate or diselenolate ligands, namely, [Mo3S7L3]2− (where L = tfd (bis(trifluoromethyl)-1,2-dithiolate) (42−), bdt ... [+]
A general route for the preparation of a series of dianionic Mo3S7 cluster complexes bearing dithiolate or diselenolate ligands, namely, [Mo3S7L3]2− (where L = tfd (bis(trifluoromethyl)-1,2-dithiolate) (42−), bdt (1,2-benzenedithiolate) (52−), dmid (1,3-dithia-2-one-4,5-dithiolate) (62−), and dsit (1,3-dithia-2-thione-4,5-diselenolate) (72−)) is reported by direct reaction of [Mo3S7Br6]2− and (n-Bu)2Sn(dithiolate). The redox properties, molecular structure, and electronic structure (BP86/VTZP) of the 42− to 72− clusters have also been investigated. The HOMO orbital in all complexes is delocalized over the ligand and the Mo3S7 cluster core. Ligand contributions to the HOMO range from 61.67% for 42− to 82.07% for 72−, which would allow fine-tuning of the electronic and magnetic properties. These dianionic clusters present small energy gaps between the HOMO and HOMO−1 orbitals (0.277−0.104 eV). Complexes 62− and 72− are oxidized to the neutral state to afford microcrystalline or amorphous fine powders that exhibit semiconducting behavior and present antiferromagnetic exchange interactions. These compounds are new examples of the still rare single-component conductors based on cluster magnetic units. [-]
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