Surface organometallic chemistry of tin: Thermal transformation, in vacuo, of ≡Si-O-SnMe3 supported on silica; in situ IR, 13C CP MAS NMR and TPD experiments

Christophe Nédez, Frédéric Lefebvre, Jean Marie Basset*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

The thermolysis of ≡Si-O-SnMe3 grafted onto partially dehydroxylated silicas has been studied by in situ IR, 13C CP MAS NMR and TPD. The only detected gaseous product was methane, showing that the thermolysis process passes through a simple hydrolysis reaction between the grafted organometallic fragment and silanol groups. This reaction leads to the formation of (≡Si-O)2SnMe2, (≡Si-O)3SnMe, and finally tin compounds without organic ligands. The relative proportions of these surface organometallic fragments have been quantitatively determined by three independent methods which gave concordant results. Due to the higher density of hydroxy groups on SiO2 200, the reactions proceed at a lower temperature on this surface. After thermal treatment at 400°C, no more methyl ligands remain on the surface and all tin species are probably present as tin(IV) compounds.

Original languageEnglish (US)
Pages (from-to)1987-1992
Number of pages6
JournalJournal of the Chemical Society - Faraday Transactions
Volume93
Issue number10
StatePublished - May 21 1997
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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