SnCl2 als Brückenligand in [{(CO)5M}2Sn(Cl)2]2− (M = Cr,Mo, W) — Synthese,Struktur und Reaktivität |
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| Authors: | Berthold Schiemenz Bjrn Antelmann Gottfried Huttner Laszlo Zsolnai |
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| Institution: | Berthold Schiemenz,Björn Antelmann,Gottfried Huttner,Laszlo Zsolnai |
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| Abstract: | SnCl2 as a Bridging Ligand in {(CO)5M}2Sn(Cl)2]2? (M = Cr, Mo, W) — Synthesis, Structure, and Reactivity {(CO)5Cr}2Sn(Cl)2]2?, 1 , may be obtained from (CO)5Cr]2? or (CO)5CrSnCl2 · THF] in fair yields. Alternatively, 1 is accessible by the reaction of Cr2(CO)10]2? with SnCl2. This procedure may be extended to the synthesis of {(CO)5M}2Sn(Cl)2]2? (M = Mo, 2 ; M = W, 3 ). The compounds 1–3 are crystallized as their alkalimetal (12-crown-4)2 or 2,2,2]cryptand salts. X-ray analyses demonstrate bridging SnCl2-moieties with M? Sn? M-angles close to 130° in each case. The relation of the bonding situation in 1–3 to the ones observed for stannylene or ?inidene”? complexes, respectively, is discussed. The transformation of 1 into the rhombododecahedral (X-ray analysis) Sn? O-cage compound {(CO)5CrSn}6(μ3-O)4(μ3-OH)4], 4 , demonstrates the reactivity of the dianions 1–3 . |
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| Keywords: | SnCl2 bridging ligand pentacarbonylmetal derivatives organometallic protection Sn?O-cage compound synthesis crystal structure |
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