Co/Fe(alpha-Alkyl-tpdt)(2) (x-): Alkyl-Substituted Cobalt and Iron Bis-dithiolenethiophenic Complexes
Tetraphenylphosphonium salts of Co and Fe complexes with alkyl substituted, tert-butyl (tb) and isopropyl (dp), 2,3-thiophenedithiolate (α-tpdt) ligands, namely TPP[Co(α-tb-tpdt)2] (3), TPP2[Fe(α-tb-tpdt)2]2 (4a-b), TPP[Co(α-dp-tpdt)2] (5) and TPP[Fe(α-dp-tpdt)2] (6) were prepared and characterized...
| Autores: | , , , , , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2020 |
| País: | España |
| Institución: | Universidad de Barcelona |
| Repositorio: | Dipòsit Digital de la UB |
| OAI Identifier: | oai:diposit.ub.edu:2445/185004 |
| Acceso en línea: | https://hdl.handle.net/2445/185004 |
| Access Level: | acceso abierto |
| Palabra clave: | Ferro Lligands Cobalt Iron Ligands |
| Sumario: | Tetraphenylphosphonium salts of Co and Fe complexes with alkyl substituted, tert-butyl (tb) and isopropyl (dp), 2,3-thiophenedithiolate (α-tpdt) ligands, namely TPP[Co(α-tb-tpdt)2] (3), TPP2[Fe(α-tb-tpdt)2]2 (4a-b), TPP[Co(α-dp-tpdt)2] (5) and TPP[Fe(α-dp-tpdt)2] (6) were prepared and characterized by cyclic voltammetry, single crystal. X-ray diffraction, magnetic susceptibility measurements and 57Fe Mössbauer spectroscopy Compound 3 and 5 are isostructural with their Au and Ni analogues with a square-planar coordination geometry. Compound 4 presents two polymorphs (4a-b) both showing a Fe(III). The magnetic susceptibility of 3 and 5 show a behavior dominated by antiferromagnetic interactions, with room temperature magnetic moments of 3.40 μB and 3.36 μB, respectively, indicating that these square-planar Co(III) complexes assume an intermediate spin electronic configuration (S=1) as supported by multiconfigurational DFT calculations. |
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