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A new tetranuclear cyanide-bridged complex [PPh4]2[NiⅡ(CN)4CuⅠ(PPh3)2]2·2CH3OH ([PPh4]+ = tetraphenylphosphine cation, PPh3 = triphenylphosphine) 1 has been synthesized and characterized by IR spectroscopy, elemental analysis, electronic absorption spectra and single-crystal X-ray diffraction. This complex crystallizes in triclinic, space group Pí with a = 10.910(5), b = 15.777(7), c = 18.275(8), α = 68.752(12), β = 79.776(13), γ = 81.400(14)°, NiCuC65H50N4OP3, Mr = 1122.25, V = 2873(2)3 , Z = 2, Dc = 1.293 g/cm3, F(000) = 1156, μ = 0.826 mm-1, the final R = 0.0755 and wR = 0.2155 for 7324 observed reflections (I > 2σ(I)). The title compound exhibits a discrete square tetranuclear structure and a cubic order NLO property. 相似文献