Physical Sciences and Mathematics Commons^™

Slow Magnetic Relaxation And Electron Delocalization In An S = 9/2 Iron(Ii/Iii) Complex With Two Crystallographically Inequivalent Iron Sites, Susanta Hazra, Sujit Sasmal, Michel Fleck, Fernande Grandjean, Moulay T. Sougrati, Meenakshi Ghosh, T. David Harris, Pierre Bonville, Gary J. Long, Sasankasekhar Mohanta

Chemistry Faculty Research & Creative Works

The magnetic, electronic, and Mössbauer spectral properties of Fe ₂L(µ-OAc)₂ClO₄, 1, where L is the dianion of the tetraimino-diphenolate macrocyclic ligand, H₂L, indicate that 1 is a class III mixed valence iron(II/III) complex with an electron that is fully delocalized between two crystallographically inequivalent iron sites to yield a [Fe₂]^V cationic configuration with a S_t 9/2 ground state. Fits of the dc magnetic susceptibility between 2 and 300K and of the isofield variable-temperature magnetization of 1 yield an isotropic magnetic exchange parameter, J, of -32(2) cm^-1 for an …