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Versatility of silica used as a ligand: effect of thermal treatments of silica on the nature of silica-supported alkyl tantalum species

Identifieur interne : 007C51 ( Main/Exploration ); précédent : 007C50; suivant : 007C52

Versatility of silica used as a ligand: effect of thermal treatments of silica on the nature of silica-supported alkyl tantalum species

Auteurs : Laurent Lefort [France] ; Mathieu Chabanas [France] ; Olivier Maury [France] ; Damien Meunier [France] ; Christophe Copéret [France] ; Jean Thivolle-Cazat [France] ; Jean-Marie Basset [France]

Source :

Journal of Organometallic Chemistry [ 0022-328X ] ; 1999.

RBID : ISTEX:D0C8AA9E40F457330FA4CDF83FFD9F1BF111E7EF

Descripteurs français

Wicri :
- topic : Tantale.

English descriptors

KwdEn :
- Catalyst preparation, Dehydroxylation, Silica, Surface organometallic chemistry, Surface species, Tantalum.

Abstract

The tris(neopentyl)neopentylidene tantalum complex reacts with the silanol groups of silica dehydroxylated at temperatures ranging from 300 to 700°C to form well-defined surface organometallic species. For a silica dehydroxylated at 300°C, the amount of available silanols allows the formation of species 3 linked by two covalent bonds to silica, while the dehydroxylation at 700°C leads to the formation of species 2 with only one covalent bond to silica. Dehydroxylation thus constitutes a way to control the hapticity of silica towards organometallic complexes.

Url:

https://api.istex.fr/document/D0C8AA9E40F457330FA4CDF83FFD9F1BF111E7EF/fulltext/pdf

DOI: 10.1016/S0022-328X(99)00396-4

Affiliations:

Links toward previous steps (curation, corpus...)

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Le document en format XML

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<front><div type="abstract" xml:lang="en">The tris(neopentyl)neopentylidene tantalum complex reacts with the silanol groups of silica dehydroxylated at temperatures ranging from 300 to 700°C to form well-defined surface organometallic species. For a silica dehydroxylated at 300°C, the amount of available silanols allows the formation of species 3 linked by two covalent bonds to silica, while the dehydroxylation at 700°C leads to the formation of species 2 with only one covalent bond to silica. Dehydroxylation thus constitutes a way to control the hapticity of silica towards organometallic complexes.</div>
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Versatility of silica used as a ligand: effect of thermal treatments of silica on the nature of silica-supported alkyl tantalum species

Versatility of silica used as a ligand: effect of thermal treatments of silica on the nature of silica-supported alkyl tantalum species

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri