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- W1977291260 abstract "Tris(1-methyl-4,5-diphenylimidazol-2-yl)methanol (L) has beensynthesized and characterised. It crystallises as L·0.51,2-Cl 2C 2H 4 from1,2-Cl 2C 2H 4–light petroleum andits crystal structure has been determined. This compound reacts withCu(NO 3) 2·3H 2O to yield[{CuL(NO 3)} 2][NO 3] 2 which has also been crystallographically characterised. Each[{CuL(NO 3)} 2] 2+ is located ona crystallographic inversion centre; the N 2O 3co-ordination sphere has a geometry intermediate between squarepyramidal and trigonal bipyramidal, with a slight bias towards theformer. The Cu(1)–O(1)–Cu(1*) bridging angle is small at95.1(2)° and the Cu···Cu separation of 3.011(1) A is typical of a coplanar-typedi-µ-oxo-copper(II) dimer. Magnetic susceptibility(300–4 K) measurements indicated that the dimeric complex has aspin-triplet ground state, i.e. the two copper(II)ions are ferromagnetically coupled. Variable-temperature (300–4 K)EPR spectroscopy confirmed an S = 1 ground statedescribed by the spin-Hamiltonian parametersg xx = 2.09,g yy = 2.08,g zz = 2.24,|D| = 0.35 cm -1and |E| = 0.049cm -1 at room temperature. The magnitude of thezero-field splitting parameter |D| and the valueof 2J decrease with decreasing temperature." @default.
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- W1977291260 date "1997-01-01" @default.
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- W1977291260 title "Synthesis, structural and magnetic characterisation of tris(1-methyl-4,5-diphenylimidazol-2-yl)methanol (L) and [{CuL(NO3)}2][NO3]2" @default.
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- W1977291260 doi "https://doi.org/10.1039/a605180d" @default.
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