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- W2622432246 abstract "Abstract Treatment of the novel biphenyl-appended N,N′-bidentate ligand, 6-(2-pyridylmethyl)-6,7-dihydro-5H-dibenzo[c,e]azepine with FeX2 (X = Cl-, Br−) affords two stable four-coordinate, pseudo-tetrahedral [Fe(NN′)X2] (where X = Cl−, 1; Br−, 2) complexes. In contrast, the same reaction in the presence of pseudo-halides, KNCS/Se, gives two six-coordinate distorted-octahedral, [trans-Fe(NN′)2(NCE)2] (where E = S, 3; Se, 4) complexes. All the four complexes were characterized by X-ray crystallography, spectroscopic (FTIR, Uv–Vis, paramagnetic 1 H NMR, Mossbauer of 1) methods, ESI-MS and variable-temperature magnetic susceptibility measurements (VSM, 20–300 K). The molecules in the crystal lattice are held together by several strong intermolecular hydrogen-bonding, π⋯π stacking (py-py or py-ph) and C–H⋯π (CH2-ph) interactions. The strong absorption spectral features of 3 and 4 in solution and the paramagnetic 1H NMR spectra of 1–4 are interpreted. Variable-temperature magnetic susceptibility measurements of solids 1–4 show magnetic moment values near 4.9 B.M., characteristic of temperature-independent high-spin (S = 2) state for Fe(II). Mossbauer spectrum of 1 complements this property. The monomeric nature of 1 and 2 is an attractive feature, which may serve as invaluable precursor to model the active-site structure and function of mononuclear non-heme iron oxidase (MNO) enzymes, involved in O2 activation and oxidation catalysis of aromatic organic substrates." @default.
- W2622432246 created "2017-06-15" @default.
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- W2622432246 date "2017-09-01" @default.
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- W2622432246 title "High-spin iron(II) complexes of halides and pseudo-halides with biphenyl-appended N,N′-bidentate ligand: X-ray structural and spectroscopic studies" @default.
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- W2622432246 doi "https://doi.org/10.1016/j.ica.2017.06.013" @default.
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