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Half sandwich compounds are organometallic complexes that feature a cyclic polyhapto ligand bound to an MLn center, where L is a unidentate ligand. Thousands of such complexes are known. Well-known examples include cyclobutadieneiron tricarbonyl and (C5H5)TiCl3. Commercially useful examples include (C5H5)Co(CO)2, which is used in the synthesis of substituted pyridines, and methylcyclopentadienyl manganese tricarbonyl, an antiknock agent in petrol. * MMT is a commercially useful antiknock compound. * CpCo(CO)2 is a catalyst for the synthesis of pyridines. * (C4H4)Fe(CO)3. * * * *

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  • Halbsandwichkomplexe
  • Half sandwich compound
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  • Als Halbsandwichkomplexe versteht man im weiteren Sinn jene Metallocenverbindungen, die nur ein Cyclopentadienyl-System über π-Bindungen an ein zentrales Metallatom gebunden besitzen. Die Absättigung freier (Elektronen-)Valenzen erfolgt über Carbonylgruppen (z. B. Tricarbonyl(η5-cyclopentadienyl)mangan), Nitrosogruppen oder andere Heteroatome (z. B. Iod). Aufgrund ihrer Form werden diese Verbindungen auch als Klavierstuhl-Komplexe bezeichnet. * Tricarbonyl(η5-cyclopentadienyl)mangan * Tricarbonyl(η5-methylcyclopentadienyl)mangan * Dicarbonyl(η5-cyclopentadienyl)iodoeisen(II)
  • Half sandwich compounds are organometallic complexes that feature a cyclic polyhapto ligand bound to an MLn center, where L is a unidentate ligand. Thousands of such complexes are known. Well-known examples include cyclobutadieneiron tricarbonyl and (C5H5)TiCl3. Commercially useful examples include (C5H5)Co(CO)2, which is used in the synthesis of substituted pyridines, and methylcyclopentadienyl manganese tricarbonyl, an antiknock agent in petrol. * MMT is a commercially useful antiknock compound. * CpCo(CO)2 is a catalyst for the synthesis of pyridines. * (C4H4)Fe(CO)3. * * * *
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