The easy replacement of the hydroxy ligand in [Os-3(CO)(10)(mu-H)(mu-OH)] by siloxy ligands affords a high-yield procedure to model compounds of the type [Os-3(CO)(10)(mu-H)(mu-OSiR2R')] (R = Et, Ph; R' = Et, Ph, OH, OSiPh2OH), a springboard to better understand the reactivity of osmium carbonyl species on the silica surface. The new clusters [Os-3(CO)(10)(mu-H)(mu-OSiPh2OH)] and [Os-3(CO)(10)(mu-H)(mu-OSiPh2OSiPh2OH)], characterized by X-ray crystallography, represent the first molecular models of silica-anchored [Os-3(CO)(10)(mu-H)(mu-OSi=)] having a ligand that mimics surface geminal and vicinal silanols, respectively.
Novel high-yield method for the synthesis of [Os-3(CO)(10)(mu-H)(mu-OSiR2R `)] species and X-ray characterization of [Os-3(CO)(10)(mu-H)(mu-OSiPh2OSiPh2OH)] and [Os-3(CO)(10)(mu-H)(mu-OSiPh2OH)], first molecular models of osmium surface species anchored to vicinal and geminal surface silanols
Lucenti E;
2000
Abstract
The easy replacement of the hydroxy ligand in [Os-3(CO)(10)(mu-H)(mu-OH)] by siloxy ligands affords a high-yield procedure to model compounds of the type [Os-3(CO)(10)(mu-H)(mu-OSiR2R')] (R = Et, Ph; R' = Et, Ph, OH, OSiPh2OH), a springboard to better understand the reactivity of osmium carbonyl species on the silica surface. The new clusters [Os-3(CO)(10)(mu-H)(mu-OSiPh2OH)] and [Os-3(CO)(10)(mu-H)(mu-OSiPh2OSiPh2OH)], characterized by X-ray crystallography, represent the first molecular models of silica-anchored [Os-3(CO)(10)(mu-H)(mu-OSi=)] having a ligand that mimics surface geminal and vicinal silanols, respectively.File | Dimensione | Formato | |
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prod_253283-doc_68164.pdf
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Descrizione: Novel High-Yield Method for the Synthesis of [Os3(CO)10(H)(OSiR2R)] Species and X-ray Characterization of [Os3(CO)10(H)(OSiPh2OSiPh2OH)] etc.
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