The [Os3(µ-H)(CO)10(MeCN)2]+ cation: synthesis and X-ray crystal structure of [Os3(µ-H)(CO)10(MeCN)2][Os(CO)3Cl3]

摘要: The clusters [Os3(CO)11(MeCN)] and [Os3(CO)10(MeCN)2] react with acids HX (X = BF4 or PF6) to form the cationic derivatives [Os3(µ-H)(CO)11(MeCN)]X [Os3(µ-H)(CO)10(MeCN)2]X, respectively. cluster also reacts dry HCl salt [Os3(µ-H)-(CO)10(MeCN)2][Os(CO)3Cl3]. X-Ray analysis of this shows that Os atoms in cation lie at vertices an isosceles triangle. A hydride bridges long Os–Os edge, two acetonitrile ligands occupy trans axial sites. Reaction [Os3(µ-H)(µ-OH)(CO)10] HBF4 MeCN produces [Os3(µ-H)(CO)10(MeCN)2]+. In reaction direct attack H+ on co-ordinated OH– ligand is considered occur resultant liberation H2O. Treatment [Os3(µ-H)(CO)10–(MeCN)2]+ [Os(CO)4]–2 leads formation neutral complex [Os4H2(CO)14(MeCN)]. bridging may be replaced by a nitrosyl NO+.