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- W2083510949 abstract "The compounds [Hpy]2[{M(mnt)2}2][M = Fe or Co, Hpy = pyridinium, mnt = maleonitriledithiolate (2,3-disulfanylmaleonitrile)] have been prepared by electrocrystallization and characterized by single-crystal X-ray diffraction, magnetic susceptibility measurements and IR and 57Fe Mössbauer spectroscopies. The compounds are isostructural, monoclinic, space group P21/n with Z= 2. They both consist in alternate packing of [{M(mnt)2}2]2– units, with the metal in a square-pyramidal environment co-ordinated by sulfur atoms, and pyridinium cations bridged by three-centred hydrogen bonds to the mnt ligands. Iron-57 Mössbauer spectroscopy confirmed the presence of five-co-ordinate FeIII atoms. Magnetic susceptibility measurements on the cobalt compound showed a small (≈ 1.5 × 10–4 emu mol–1 at room temperature) paramagnetism, almost temperature independent below 150 K (≈ 0.7 × 10–4 emu mol –1), while the iron analogue had a strong paramagnetic contribution of antiferromagnetically coupled pairs of S= 3/2; in the [{Fe(mnt)2}2]2– units, with –2J/kB= 515 K. These properties are correlated to the crystal structure and compared with other [{M(mnt)2}2]2– compounds with M = Fe or Co." @default.
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- W2083510949 date "1994-01-01" @default.
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- W2083510949 title "Synthesis, structure and properties of [Hpy]2[{M(mnt)2}2](M = Co or Fe, Hpy = pyridinium, mnt = maleonitriledithiolate)" @default.
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- W2083510949 doi "https://doi.org/10.1039/dt9940002655" @default.
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