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Metal carbonyl hydrides are complexes of transition metals with carbon monoxide and hydride as ligands. These complexes are useful in organic synthesis as catalysts in homogeneous catalysis, such as hydroformylation. == Preparation == (詳細はWalter Hieber prepared the first metal carbonyl hydride in 1931 by the so-called Hieber base reaction of metal carbonyls. In this reaction a hydroxide ion reacts with the carbon monoxide ligand of a metal carbonyl such as iron pentacarbonyl in a nucleophilic attack to form a metallacarboxylic acid. This intermedia releases of carbon dioxide in a second step, giving the iron tetracarbonyl hydride anion. The synthesis of cobalt tetracarbonyl hydride (HCo(CO)4) proceeds in the same way.〔W. Hieber, F. Leutert: ''Zur Kenntnis des koordinativ gebundenen Kohlenoxyds: Bildung von Eisencarbonylwasserstoff.'' ''Die Naturwissenschaften.'' volume 19, 1931, pp. 360–361, .〕 :Fe(CO)5 + NaOH → Na() :Na() → Na() + CO2 A further synthetic route is the reaction of the metal carbonyl with hydrogen.〔H. D. Kaesz,R. B. Saillant: ''Hydride Complexes of the Transition Metals" Chem. Rev., 1972, volume 72, pp 231–281..〕 The protonation of metal carbonyl anions, e.g. ()-, leads also to the formation of metal carbonyl hydrides. 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「Metal carbonyl hydride」の詳細全文を読む スポンサード リンク
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