Mondal, Amit KumarJover Modrego, JesúsRuiz Sabín, EliseoKonar, Sanjit2019-10-222019-10-222017-05-111359-7345https://hdl.handle.net/2445/142718In this work we report two pentacoordinated Co-II-P4X1 Single Ion Magnets (SIMs) based on P-donor ligands. The tetradentate ligand tris[2-(diphenylphosphino) ethyl] phosphine allows the obtention of the isostructural square pyramidal [Co(PP3)Cl]center dot ClO4 (1) and [Co(PP3)Br]center dot ClO4 (2) complexes. Consistent theoretical and experimental studies indicate that these complexes have a high spin (S = 3/2) ground state and suggest that the relaxation dynamics is governed by ground state quantum tunneling, whereas its temperature dependence is directed by optical or acoustic Raman processes.4 p.application/pdfeng(c) Mondal, Amit Kumar et al., 2017ImantsLligandsComplexos metàl·licsMagnetsLigandsMetal complexesinfo:eu-repo/semantics/article6737072019-10-22info:eu-repo/semantics/openAccess