Synthesis and Crystal Structure of an Octa-nuclear V-Cu-S Cluster:[VS_3O(CuPBu_3)_2(CuSPBu_3)]_2

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The title compound has been synthesized by reaction of (NH4)3VS4,CuCl, and PBu3 in CH2Cl2 and its structure was determined by single crystal X-raydiffraction. Crystallographic data: C72 H162 Cu6O2P6S8V2, Mr= 1985. 57, monoclinicspace group C2/c, a= 17. 864(3), b= 25. 946(8), c= 24.071 (7),β= 112. 79(2)°,V = 10285. 9, Z= 4, Dc= 1. 28 g/cm3, F(000) = 4192, μ(MoKa) = 16. 7 cm-1,the final R=0.065 and Rw =0.074 for 4051 unique reflections with I> 3σ(I). Thestructure can be described as a metal-sulfur dodecahedral cage fused by two incompletecubane-like VS3Cu3 units connected by Cu - S bonds. The Cu - S bonds within theasymmetric VS3Cu3 unit are slightly shorter than those linking the two centrosymmetrically related VS3Cu3 units. The six copper and two vanadium atoms display asomewhat distorted cubane array with a μ4-S atom on each face of the metal cubane. The title compound has been synthesized by reaction of (NH4) 3VS4, CuCl, and PBu3 in CH2Cl2 and its structure was determined by single crystal X-raydiffraction. Crystallographic data: C72 H162 Cu6O2P6S8V2, Mr = 1985. 57. monoclinicspace group C2 / c , a = 17.864 (3), b = 25. 946 (8), c = 24.071 (7), β = 112. 79 (2) °, V = 10285.9, Z = 4, Dc = 1. 28g / cm3, F (000) = 4192, μ (MoKa) = 16. 7 cm-1, the final R = 0.065 and Rw = 0.074 for 4051 unique reflections with I> 3σ (I) The metal-sulfur dodecahedral cage fused by two incomplexubane-like VS3Cu3 units connected by Cu - S bonds. The Cu - S bonds within theasymmetric VS3Cu3 unit are slightly shorter than those linking the two centrosymmetrically related VS3Cu3 units. The six copper and two vanadium atoms display asomewhat distorted cubane array with a μ4-S atom on each face of the metal cubane.
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