Preparation and characterization of novel Os-diolefin dimers: new entry to Os-cyclooctadiene complexes.
作者： Miguel A. Esteruelas , Cristina García-Yebra , Montserrat Oliván , Enrique Oñate
DOI: 10.1021/IC0612799
关键词: Osmium 、 Cyclooctadiene 、 Medicinal chemistry 、 Chemistry 、 Nucleophilic substitution 、 Nanotechnology 、 Deprotonation 、 Iridium 、 Cyclopentadienyl complex 、 Dimer 、 Ligand
摘要: The complex [H(EtOH)2][{OsCl(η4-COD)}2(μ-H)(μ-Cl)2] (1) has been prepared in high yield by treatment of OsCl3·3H2O (54% Os) with 1,5-cyclooctadiene ethanol under reflux. Under air, it is unstable and undergoes oxidation action O2 to afford the neutral derivative {OsCl(η4-COD)}2(μ-H)(μ-Cl)2 (2). terminal chlorine ligands anion 1 are activated toward nucleophilic substitution. Thus, reaction salt [NBu4][{OsCl(η4-COD)}2(μ-H)(μ-Cl)2] (1a) NaCp toluene gives [NBu4][{Os(η1-C5H5)(η4-COD)}(μ-H)(μ-Cl)2{OsCl(η4-COD)}] (3) as a result replacement one atoms cyclopentadienyl ligand. CH2 group latter can be deprotonated bridging methoxy ligand iridium dimer [Ir(μ-OMe)(η4-COD)]2. leads trinuclear [NBu4][{(η4-COD)Ir(η5-C5H4-η1)Os(η4-COD)}(μ-H)(μ-Cl)2{OsCl(η4-COD)}] (4) containing C5H4 that η1-coordinated an osmium atom dimeric unit η5-coordinated the...
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