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Synthesis and Crystal Structure of a New μ-Oxamide Trimeric Hetero-tetranuclear Complex

         

摘要

A novel oxamide-bridged trimeric tetranuclear complex 1 incorporating a macro- cyclic oxamide of formula {[(CuL)3Mn](ClO4)2}3 (macrocyclic oxamide L = 2,3-dioxo-5,6,14,15- dibenzo-1,4,8,12-tetraazacyclopentadeca-7,12-diene) was prepared and structurally characterized. The compound [(CuL)3Mn](ClO4)2 crystallizes in the trigonal system, space group with a = 22.434(17), b = 22.434(17), c = 18.82(2) (A), α = β = 90, γ = 120o, V = 8203(13) (A)3, Z = 6, Dc = 1.751g/cm3, μ(MoKα) = 1.557, F(000) = 4392, the final R = 0.083 and wR = 0.1727 for 9604 obser- ved reflections with I > 2σ(I). The single-crystal X-ray analysis shows that 1 is a trimeric complex. There are three similar constitutes, dissimilar conformations and asymmetrically independent 'building-block' [(CuL)3Mn] in one crystal cell of the title complex 1.

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