2007年12月
Catalytic hydration of alkynes over bronsted acid sites developed on halide clusters
JOURNAL OF CLUSTER SCIENCE
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- 巻
- 18
- 号
- 4
- 開始ページ
- 845
- 終了ページ
- 853
- 記述言語
- 英語
- 掲載種別
- DOI
- 10.1007/s10876-007-0160-7
- 出版者・発行元
- SPRINGER/PLENUM PUBLISHERS
When a molecular tungsten halide cluster on silica gel, (H3O)(2)[(W6Cl8)Cl-6] center dot 6H(2)O/SiO2, was treated in a nitrogen stream at temperatures above 250 degrees C, Bronsted acidity appeared as the result of formation of a hydroxo ligand. The cluster catalyzed hydration of 1-hexyne to yield 2-hexanone. The catalytic activity increased with increasing temperature, the selectivity for 2-hexanone being 70% in the temperature range 250-400 degrees C. 1-Heptyne, 1-octyne, 1-nonyne, and phenylacetylene were also preferentially hydrated to produce the corresponding ketones. 2-Hexyne provided 2- and 3-hexanones in equal amounts, as happens with Bronsted acid catalysts. Halide clusters of niobium, molybdenum, and tantalum having the same octahedral metal framework were also active catalysts for the reaction.
- リンク情報
- ID情報
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- DOI : 10.1007/s10876-007-0160-7
- ISSN : 1040-7278
- CiNii Articles ID : 120001370579
- Web of Science ID : WOS:000251371300006