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- W2953256220 abstract "The molecular structure of the compound Cu2F2(DMPZ)2(MPZ)4(BF4)2 (DPZ = 3,5-dimethylpyrazole; MPZ = 5-methylpyrazole), determined by single-crystal X-ray analysis, is described. The compound was obtained via partial substitution of DMPZ ligands in Cu2F2-(DMPZ)6(BF4)2.The compound crystallizes in space group P1, with a = 9.578(2) A, b = 9.893(1) A, c = 10.994(2) A, α = 104.27(1)°, β = 109.04(2)°, γ = 99.12(1)° and Z = 1. Reflection data were collected using an Enraf-Nonius CAD-4 single-crystal diffractometer and graphite-monochromated Mo-Kα radiation. The structure was solved using conventional Patterson, Fourier and least-squares refinement techniques. The final conventional discrepancy index (R) was 4.1%, based on 4442 independent reflections.The compound is dimeric, having asymmetric fluoro bridges (CuF: 1.904(2) and 2.258(2) A) with a CuFCu angle of 97.19(8)° and a Cu–Cu distance of 3.131(1) A. The copper atom is in a square-based pyramidal coordination geometry with one fluoride ion in apical position. Strong HF interactions were observed between the NH protons of the substituted pyrazole ligands and the bridging fluoride ion as well as with one or two of the fluorides of the BF4− anion. The BF4− anion is present in two different orientations having one BF bond in common, i.e. they are related by a rotation around this BF bond.Magnetic susceptibility measurements down to 2 K and EPR spectroscopy showed the existence of weak super-exchange interactions (|J| < 0.4 cm−1). These results are discussed in relation to the available structural information." @default.
- W2953256220 created "2019-06-27" @default.
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- W2953256220 date "1982-02-16" @default.
- W2953256220 modified "2023-09-27" @default.
- W2953256220 title "ChemInform Abstract: SYNTHESIS, STRUCTURE AND MAGNETISM OF DI-μ2-FLUOROBIS(3,5-DIMETHYLPYRAZOLE)TETRAKIS(5-METHYLPYRAZOLE)DICOPPER(II) BIS(TETRAFLUOROBORATE)" @default.
- W2953256220 doi "https://doi.org/10.1002/chin.198207274" @default.
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