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- W1979803471 abstract "Appreciable changes in effective magnetic moment, isomer shift (Is) and quadrupole splitting (ΔEq) (Mössbauer spectra) as well as in the EPR spectra occur upon cooling a sample of the title compound [Fe(salophen)NO] at a temperature of about 180 K. The observed changes are consistent with a S = 32 ηS = 12 spin crossover. At 300 K Is=0.29 and ΔEq=0.198 mm s−1, while for a sample temperature of 100 K values are observed of 0.15 and 1.738 mm s−1, respectively. In the EPR spectrum of polycrystalline samples a broad signal is observed. At 100 K two sharp lines corresponding to gη=2.108 and g|=2.211 are present. The EPR spectrum for 12 K is nearly identical to the spectrum obtained at 100 K. The physicochemical properties of the complex resemble strongly those of the analogue [Fe(salen)NO] and consequently rationalization of the results in terms of the MO diagram for the latter complex can be given. From the magnetic susceptibility and Mössbauer data a separation of the orbitals—involved in the spin-crossover process—of about 300cm−1 was calculated. Analysis of the magnetic-susceptibility data further reveals, via the large values found for ΔS⊝ (286.2 J mol−1K−1) and ΔH⊝ (28.9 kJ mol−1), that the spin crossover is accompanied by a relative large change in the bonding distances and/or angles. In oxygen- and/or water-containing solutions the complex is rapidly transformed into the μ-oxo-dimer [Fe(salophen)]2O." @default.
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- W1979803471 date "1987-01-01" @default.
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- W1979803471 title "Synthesis of [N,N′-phenylenebis(salicylideniminato)] mononitrosyliron and its characterization in the solid state (IR,EPR, mössbauer, X-ray analysis and magnetic susceptibility)" @default.
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- W1979803471 doi "https://doi.org/10.1016/s0277-5387(00)80801-3" @default.
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