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|Section2= |Section3= |Section7= |Section8= }} Triosmium dodecacarbonyl is a chemical compound with the formula Os3(CO)12. This yellow-colored metal carbonyl cluster is an important precursor to organo-osmium compounds. Many of the advances in cluster chemistry have arisen from studies on derivatives of Os3(CO)12 and its lighter analogue Ru3(CO)12. ==Structure and synthesis== The cluster has D3h symmetry, consisting of an equilateral triangle of Os atoms, each of which bears two axial and two equatorial CO ligands. The Os–Os bond distance is 2.88 Â (288 pm).〔Corey, E. R.; Dahl, L. F. “The Molecular and Crystal Structure of Os3(CO)12” Inorganic Chemistry 1962, volume 1, pages 521–526; .〕 Ru3(CO)12 has the same structure, whereas Fe3(CO)12 is different, with two bridging CO ligands resulting in C2v symmetry. Os3(CO)12 is prepared by the direct reaction of OsO4 with carbon monoxide at 175 °C:〔Drake, S. R.; Loveday, P. A. “Dodecarbonyltriosmium” Inorganic Syntheses, 1990, volume 28, pages 230–231. ISBN 0-471-52619-3.〕 : 3 OsO4 + 24 CO → Os3(CO)12 + 12 CO2 The yield is nearly quantitative. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Triosmium dodecacarbonyl」の詳細全文を読む スポンサード リンク
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