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- W2033658993 abstract "The compounds (C4H16N2O2)Cu2Cl6 and (C4H16N2O2)Cu2Br6 have been synthesized and their crystal structures determined. EPR and magnetic susceptibility measurements were made. The crystals of both compounds are triclinic, space group P1 with a= 6.077(1), b=8.068(2), c=8.455(2) Å, α=67.99(2), β=79.90(2), γ=78.77(2)°, Z=2, and Dcalc= 2.08 g/cm3 for the chloride salt, and a=6.418(2), b=8.262(2), c=8.764(2) Å, α=68.17(2), β=80.12(2), γ=78.47(2)°, Z=2, and Dcalc=2.88 for the bromide salt. The structures, solved by direct methods and refined by least-squares calculations to R=0.036 (chloride) and R=0.049 (bromide), consist of nearly planar Cu2X62− dimers stacked to form infinite chains. The coordination of the copper atoms may be described as distorted square pyramidal with an ethanolammonium oxygen semi- coordinated to the sixth coordination site for each copper atom. Both compounds exhibit predominantly antiferromagnetic exchange interactions. The bromide salt exhibits a intradimer singlet-triplet energy splitting of J/k=−64 K and a interdimer splitting of J′/k=−21 K, while for the chloride J/k=−6 K and J′/k=−6 K is deduced. A comparison with the magnetic behavior of other Cu2- X62− dimers is given." @default.
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- W2033658993 title "Structural and magnetic properties of bis(ethanolammonium)hexahalodicuprate(II) salts: Copper(II) halide dimers with a square-pyramidal type distortion" @default.
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- W2033658993 doi "https://doi.org/10.1016/s0020-1693(00)83909-2" @default.
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