Silva, Rafaela A. L.Santos, RodrigoAndrade, Marta M.Santos, Isabel C.Coutinho, Joana T.Pereira, Laura C. J.Waerenborgh, Joao C.Vieira, Bruno J. C.Cirera Fernández, JordiRuiz Sabín, EliseoAlmeida, ManuelBelo, Dulce2022-04-192022-04-192020-07-060020-1669https://hdl.handle.net/2445/185004Tetraphenylphosphonium 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.9 p.application/pdfeng(c) American Chemical Society , 2020FerroLligandsCobaltIronLigandsCobaltinfo:eu-repo/semantics/article7033852022-04-19info:eu-repo/semantics/openAccess