The dependence of Mössbauer parameters on magnetic moments in iron(III) dithiocarbamates

Iron(III) Spin Crossover Compounds

“…This is reflected in the generally good planarities of the S 2 CNC 2 ligand fragments [14]. In this respect, it has been proposed that in the complexes, the partially filled d-orbitals of iron(III) may interact with empty ligand porbitals arising from the d-orbitals of sulfur [28,29]. This back-donation, together with the inductive strength of the substituent R attached to the nitrogen atom, and the steric constraints involved when the substituent is part of a ring system, should result in partial double-bond character of the S-C and C-N bonds to varying extents [15].…”

“…Unlike the normal situation in iron(II) and also in many other iron(III) systems, 57 Fe Mössbauer spectroscopy generally fails to give clear evidence of the simultaneous existence of the two electronic states. The 57 Fe Mössbauer spectra of the dithiocarbamate systems exhibit only a single quadrupole doublet with broad line widths within the temperature range of the spin crossover [35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50]. The rapid inter-conversion of spin states-faster or comparable to the lifetime of the 57 Fe nucleus (t=1.410 7 s)-in those materials prevents the observation of separate lines for high spin and low spin molecules.…”

Nitrosylbis(diorganodithiocarbamato)iron complexes. Effect of organic substituents

“…Correlations between the Móssbauer solid-state parameters and µ^ß ) were observed, however. 30 Móssbauer Data. The room-temperature Móssbauer isomer shifts (IS) and quadrupole splittings (AEq) for the 14 Fe-(NO)(dtc)2 compounds are listed in Table I.…”

Moessbauer spectrometry

“…Eley el al. found a linear relation between and magnetic moment for Fe(II) dithiocarbamates (210). For some 20 organotin dithiocarbamates, DeVries and Herber obtained a linear -electronegativity plot (181).…”