Surface organometallic chemistry of tin: Reactivity of tetraalkyltin complexes and tributyltin hydride toward silica

Journal Article · Wed Jan 27 00:00:00 EST 1993 · Journal of the American Chemical Society; (United States)

DOI:https://doi.org/10.1021/ja00055a049· OSTI ID:6567625

Nedez, C; Theolier, A; Lefebvre, F; Choplin, A; Basset, J M ^[1]; Joly, J F ^[2]

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1. Universite Cl. Bernard, Villeurbanne (France)
2. Institut Francais du Petrole, Rueil Malmaison (France)

Tetraalkyltin complexes, SnR[sub 4] (R = Me, Et, i-Pr, Bu), and tributylhydridotin were reacted with the surface of partially dehydroxylated silica. Interaction between the complexes and the silica surface was followed by IR and [sup 13]C and [sup 119]Sn MAS NMR spectroscopies and analysis of the evolved gases. At room temperature, all the studied complexes are physisorbed: a hydrogen-type bonding between the terminal methyl group of the alkyl ligands and/or the hydride ligand and the surface silanol groups is evidenced. Above 100[degrees]C, with silica dehydroxylated at 500[degrees]C (SiO[sub 2](500)), a reaction occurs, leading to the formation at 200[degrees]C of essentially one surface complex,-SiO-SnR[sub 3] (1) with evolution of 1 mol of alkane per mol of surface tin. 1 is already formed at room temperature by reaction of silica with Bu[sub 3]SnH; the reaction is slow and liberates 1 mol of H[sub 2]/mol of surface Sn. At low surface coverage, and for R [ne] Me, the alkyl ligands of 1 are folded toward the surface, interacting with it via hydrogen-type bonding. The same interaction and reaction are observed when the surface of silica is less dehydroxylated, SiO[sub 2](200): nevertheless 1 is less stable, probably due to the availability of surface silanol groups in the neighborhood of 1. 28 refs., 9 figs., 1 tab.

• OSTI ID: 6567625
• Journal Information: Journal of the American Chemical Society; (United States), Vol. 115:2; ISSN 0002-7863
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ORGANOMETALLIC COMPOUNDS
CHEMICAL REACTIONS
SILICON OXIDES
TIN COMPOUNDS
ABSORPTION SPECTROSCOPY
NUCLEAR MAGNETIC RESONANCE
CHALCOGENIDES
MAGNETIC RESONANCE
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
RESONANCE
SILICON COMPOUNDS
SPECTROSCOPY
400201* - Chemical & Physicochemical Properties