Surface versus Molecular Siloxy Ligands in Well-Defined Olefin Metathesis Catalysts: [{(RO)3SiO}Mo(NAr)(CHtBu)(CH2tBu)]

Surface organometallic chemistry: Similar electronic properties of molecular and surface siloxy ligands in 1 m and 1 were revealed by a structural investigation with solid‐state NMR spectroscopy and a reactivity study in olefin metathesis. Despite similar initial turnover frequencies, the silica‐sup...

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Published inAngewandte Chemie International Edition Vol. 45; no. 8; pp. 1216 - 1220
Main Authors Blanc, Frédéric, Copéret, Christophe, Thivolle-Cazat, Jean, Basset, Jean-Marie, Lesage, Anne, Emsley, Lyndon, Sinha, Amritanshu, Schrock, Richard R.
Format Journal Article
LanguageEnglish
Published Weinheim WILEY-VCH Verlag 13.02.2006
WILEY‐VCH Verlag
Wiley
Subjects
carbene ligands
Chemistry
Chemistry, Multidisciplinary
heterogeneous catalysis
metathesis
molybdenum
Physical Sciences
Science & Technology
heterogeneous catalysis
metathesis
SILSESQUIOXANES
NMR-SPECTROSCOPY
carbene ligands
ORGANOMETALLIC CHEMISTRY
SOLIDS
BONDS
REACTIVITY
ALKYLIDYNE COMPLEXES
molybdenum
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Summary:Surface organometallic chemistry: Similar electronic properties of molecular and surface siloxy ligands in 1 m and 1 were revealed by a structural investigation with solid‐state NMR spectroscopy and a reactivity study in olefin metathesis. Despite similar initial turnover frequencies, the silica‐supported catalyst 1 is more stable than 1 m and allows it to achieve higher turnovers, thus showing the advantage of site isolation on surfaces.
Bibliography:ArticleID:ANIE200503205
F.B. is grateful to the French Ministry of Education, Research, and Technology (MENRT) for a predoctoral fellowship. We thank B. Fenet for recording solution-state 29Si{1H} NMR spectra. We are also indebted to the CNRS, ESCPE Lyon, and the National Science Foundation (R.R.S.) for financial support.
istex:5940CF0B20A38EAC4B8EDABE9DD5948434FCF31B
ark:/67375/WNG-37P3ZTRJ-X
F.B. is grateful to the French Ministry of Education, Research, and Technology (MENRT) for a predoctoral fellowship. We thank B. Fenet for recording solution‐state
1
Si
29
H} NMR spectra. We are also indebted to the CNRS, ESCPE Lyon, and the National Science Foundation (R.R.S.) for financial support.
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.200503205