Spectroscopic studies on adsorbed metal carbonyls. Part 2. Interaction of [Ru3(CO)12] with silica, titania, and alumina
- 1 January 1984
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 6,p. 1123-1131
- https://doi.org/10.1039/dt9840001123
Abstract
The reactions between [Ru3(CO)12] and SiO2, TiO2, and Al2O3 have been studied by electronic and i.r. spectroscopy using 13C isotopic substitution. The complex [Ru3(µ-H)(CO)10(µ-OSi)] was initially generated on silica, but this oxidised in air to [RuII(CO)2]n(n= 2 or 3) species. Vacuum pyrolysis however generated another [RuII(CO)2]n species where n≃ 1 and some metallic ruthenium. Subsequent heating under CO generated RuIII and RuIV monocarbonyl sites. The initial silica-type supported cluster was not observed on titania and alumina. The initial impregnation reactions generate similar species to the room-temperature air oxidation products on silica. The subsequent chemistry on titania is complex but evidence was obtained for four monocarbonyls on differing ruthenium centres (suggested as RuO, RuII, RuIII, and RuIV) and a bridging carbonyl site.Keywords
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