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Isolation of a singly oxo-bridged Fe(III) dinuclear complex: Synthesis, crystal structure, spectroscopic and magnetic studies |
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| Authors: | Arpi Majumder M. Salah El Fallah Samiran Mitra |
| Affiliation: | a Department of Chemistry, Jadavpur University, Kolkata 700 032, India b Cristallographie et Ingénierie Moléculaire, Laboratoire des Multimatériaux et Interfaces - UMR 5615, Université Claude Bernard Lyon 1, Bât. Jules Raulin 43 Bd du 11 Novembre 1918, 69622 Villeurbanne Cedex, France c Department de Quimica Inorganica, Universitat de Barcelona, Marti I Franques, 1-11, 08028 Barcelona, Spain |
| Abstract: | The μ-oxo dinuclear complex {Fe2O(tptz)2[N(CN)2]2(NO3)2} (1) (where tptz = 2,4,6-tris(2-pyridyl)-1,3,5-triazine) has been synthesised and characterised by elemental analysis, FT-IR, UV-vis, cyclic voltammetry, Mössbauer spectroscopy, and variable-temperature magnetic susceptibility measurements and single crystal X-ray diffraction. The iron centres have a pentagonal-bipyramidal geometry. The dimeric neutral complex exhibits typical Fe-μ-O bond lengths of 1.763(1) Å and a bridge angle of 180.00°. The Fe?Fe separation is 3.526(3) Å. The Mössbauer spectrum at room temperature consists of one quadrupole doublet with an isomer shift of 0.41 mm/s and a quadrupole splitting of 1.12 mm/s. Variable-temperature magnetic susceptibility measurements have been measured in the temperature range 300-2 K, revealing an intramolecular antiferromagnetic coupling (J = −211.6 cm−1). |
| Keywords: | Iron(III) μ-oxo complex Dinuclear complex tptz and dca Crystal structure Mö ssbauer spectral studies Antiferromagnetic coupling |
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