title: Control of spins by ring deformation in a diiron(III)bisporphyrin: reversal of ClO4⁻ and CF3SO3⁻ ligand field strength in the magnetochemical series.
abstract: The complete reversal of the ligand field strength of ClO(4)(-) and CF(3)SO(3)(-) in the magnetochemical series is observed in a diiron(III)bisporphyrin. While ClO(4)(-), as the axial ligand, gives a typical high-spin complex, just twisting the conformation of the porphyrin macrocycle gives properties of a pure intermediate-spin state with CF(3)SO(3)(-), although the axial ligand strengths suggest the reverse order of spin stabilization.
authors.affiliation: Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, India.
authors.forename: Susovan
authors.initials: S
authors.lastname: Bhowmik
authors.forename: Sudip Kumar
authors.initials: SK
authors.lastname: Ghosh
authors.forename: Sankar Prasad
authors.initials: SP
authors.lastname: Rath
mesh_terms: D018360:Crystallography, X-Ray; D005290:Ferric Compounds / Q000737:chemistry*; D008024:Ligands; D008280:Magnetics; D008665:Metalloporphyrins / Q000737:chemistry*; D008958:Models, Molecular; D008968:Molecular Conformation; D010472:Perchlorates / Q000737:chemistry*; D013237:Stereoisomerism; D013431:Sulfates / Q000737:chemistry*
chemical_list: D005290:Ferric Compounds; D008024:Ligands; D008665:Metalloporphyrins; D010472:Perchlorates; D013431:Sulfates