Synthesis and Crystal Structures of Novel Copper(I) Clusters with Bridging Silyl Amide Ligands |
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Authors: | Christoph Wagner Kurt Merzweiler |
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Affiliation: | Institut für Chemie, Naturwissenschaftliche Fakult?t II, Universit?t Halle, Kurt Mothes‐Str. 2, 06120 Halle, Germany |
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Abstract: | Treatment of copper(I) chloride with R2Si(NLiPh)2 (R = Me, Ph) in thf led to the formation of the octanuclear cluster compounds [Cu8{(R2Si(NPh)2}4] [R = Me ( 1 ), Ph ( 2 ).] Compound 1 crystallizes in the tetragonal space group P4/n, with a = 1505.41(5) and c = 1911.32(7) pm. The X‐ray crystal structure determination revealed a cube shaped Cu8 cluster core with μ4 bridging Me2Si(NPh)22– ligands. The copper atoms display an almost linear coordination with Cu–N distances in the range of 191.1(3)–191.4(3) pm. The Cu–Cu distances are 265.7(1)–267.3(1) pm. Compound 2 forms monoclinic crystals, space group P21/n, with a = 1461.87(4), b = 2483.77(6), c = 2725.49(8) pm, β = 100.77(1)°. The cluster core of compound 2 consists formally of two mutually perpendicular arranged trigonal prisms, which share a common square face. Like in the case of compound 1 the square faces of the cluster core are capped by μ4 bridging Ph2Si(NPh)22– ligands. The copper atoms adopt a nearly linear N–Cu–N coordination with Cu–N distances of 190.0(4)–195.1(4) pm. The Cu–Cu distances are 252.3(1)–305.6(1) pm. |
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Keywords: | Silylamide Copper Cluster compounds X‐ray diffraction |
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