Reactions of silicon atoms and small clusters with CO: Experimental and theoretical characterization of Si{sub n}CO (n=1-5), Si{sub 2}(CO){sub 2}, c-Si{sub 2}({mu}-O)({mu}-CSi), and c-Si{sub 2}({mu}-O)({mu}-CCO) in solid argon

Reactions of silicon atoms and small clusters with carbon monoxide molecules in solid argon have been studied using matrix isolation infrared absorption spectroscopy. In addition to the previously reported SiCO monocarbonyl, Si{sub 2}(CO){sub 2} and Si{sub n}CO (n=2-5) carbonyl molecules were formed...

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Bibliographic Details
Published in:The Journal of chemical physics 2004-12, Vol.121 (21)
Main Authors: Zhou Mingfei, Jiang Ling, Xu Qiang, National Institute of Advanced Industrial Science and Technology
Format: Article
Language:English
Subjects:
ABSORPTION SPECTROSCOPY
ANNEALING
ARGON
ATOM-MOLECULE COLLISIONS
ATOMIC CLUSTERS
CARBON MONOXIDE
CHEMICAL BONDS
INFRARED SPECTRA
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
ISOMERS
ISOTOPIC EXCHANGE
MATRIX ISOLATION
PHOTOCHEMISTRY
SILICON
SILICON COMPOUNDS
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Summary:Reactions of silicon atoms and small clusters with carbon monoxide molecules in solid argon have been studied using matrix isolation infrared absorption spectroscopy. In addition to the previously reported SiCO monocarbonyl, Si{sub 2}(CO){sub 2} and Si{sub n}CO (n=2-5) carbonyl molecules were formed spontaneously on annealing and were characterized on the basis of isotopic substitution and theoretical calculations. It was found that Si{sub 2}CO, Si{sub 3}CO, and Si{sub 5}CO are bridge-bonded carbonyl compounds, whereas Si{sub 4}CO is a terminal-bonded carbonyl molecule. The Si{sub 2}(CO){sub 2} and Si{sub 3}CO molecules photochemically rearranged to the more stable c-Si{sub 2}({mu}-O)({mu}-CCO) and c-Si{sub 2}({mu}-O) ({mu}-CSi) isomers where Si{sub 2} is inserted into the CO triple bond.
ISSN:0021-9606
1089-7690
DOI:10.1063/1.1811078