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  4. Well-Defined Silica-Supported Mo-Alkylidene Catalyst Precursors Containing One OR Substituent: Methods of Preparation and Structure-Reactivity Relationship in Alkene Metathesis
 
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research article

Well-Defined Silica-Supported Mo-Alkylidene Catalyst Precursors Containing One OR Substituent: Methods of Preparation and Structure-Reactivity Relationship in Alkene Metathesis

Rendon, Nuria
•
Berthoud, Romain
•
Blanc, Frederic
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2009
Chemistry-A European Journal

The monosiloxy surface complexes [( SiO)Mo( NAr)(=CHC-Me(2)R')(OR)] (R' = Me or Ph: OR = OtBu, OCMe(CF(3))(2) or OAr) are obtained by grafting onto SiO(2-(700)) either symmetric Mo-alkylidene derivatives [Mo( NAr)(=CHCMe(2)R')(OR)(2)] Or asymmetric derivatives, that is, with two different pendant ligands, one amido and one alkoxy/aryloxy, [Mo( NAr)(=CHCMe(2)R')(OR)(NC(6)H(8))]. ne formation of these complexes was confirmed by mass-balance analysis, and infrared (IR) and NMR spectroscopies. These systems are highly efficient catalyst precursors for the metathesis of acyclic alkenes; the best results were seen when OR = OCMe-(CF(3))(2). Nevertheless, they display poor performances in ring-closing metathesis, possibly due to the rigidity of the metal center (as evidenced by NMR spectroscopy), which therefore slows the rate of the metathesis.

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Type
research article
DOI
10.1002/chem.200802465
Web of Science ID

WOS:000266292200016

Author(s)
Rendon, Nuria
•
Berthoud, Romain
•
Blanc, Frederic
•
Gajan, David
•
Maishal, Tarun
•
Basset, Jean-Marie
•
Coperet, Christophe
•
Lesage, Anne
•
Emsley, Lyndon  
•
Marinescu, Smaranda C.
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Date Issued

2009

Publisher

WILEY-V C H VERLAG GMBH

Published in
Chemistry-A European Journal
Volume

15

Issue

20

Start page

5083

End page

5089

Subjects

metathesis

•

silica supports

•

solid-state NMR spectroscopy

•

surface chemistry

•

molybdenum

Peer reviewed

REVIEWED

Written at

OTHER

EPFL units
LRM  
Available on Infoscience
January 8, 2015
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/110043
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