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- W2092343338 abstract "The complex tetrakis-μ-acetato-bis(3-pyridyl-carbinol)dicopper(II) monoethylenedichloride, Cu2CH3COO)4(3-pycar)2·CH2Cl2 was synthesized, and spectral and magnetic data obtained. The crystal and molecular structure were determined from three-dimensional counter X-ray data. The complex crystallizes in the monoclinic space group P21/c with four formula units (Z = 4) in a cell of dimensions a = 16.778) Å, b = 19.853(14) Å, c = 8.384(4) Å, and β = 97.38(5)°. The observed and calculated densities are 1.598 g cm−3. The structure was refined by blocked-cascade full-matrix least-squares methods to an R factor 0f 0.043 using 2509 independent intensities. The structure consist of two independent centrosymmetric tetra-carboxylato-bridged dimers with the 3-pyridyl-carbinol molecules (ronicol) in the axial positions. The CuCu, CuOeq (mean) and CuNax distances in the two independent dimers are: 2.654(1), 1.963(4) and 2.197(5) Å; 2.634(1), 1.969(4) and 2.152(5) Å, respectively. The EPR spectrum of a polycrystalline sample of the complex revealed triplet state (S = 1) transitions. Variable temperature (93-293) K) magnetic measurements indicate an antiferromagnetic interaction of −2J = 330(8) cm−1. The magnetic data and the X-ray crystallographic results, together with literature data, were used to determine the relationship between the donor ability of the axial ligands, the displacement of the copper(II) atoms from the basal plane towards the apical ligands, and the length of the CuCu bond." @default.
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- W2092343338 date "1985-09-01" @default.
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- W2092343338 title "Spectroscopic, magnetic and structural characterization of tetrakis-μ-acetato-bis(3-pyridylcarbinol)dicopper(II) monomethylenedichloride" @default.
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- W2092343338 doi "https://doi.org/10.1016/s0020-1693(00)87488-5" @default.
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