@article{oai:sucra.repo.nii.ac.jp:00013123,
 author = {Kamiguchi, Satoshi and Takahashi, Ikuko and Kondo, Kunihiko and Nagashima, Sayoko and Kurokawa, Hideki and Miura, Hiroshi and 千原, 貞次},
 issue = {4},
 journal = {JOURNAL OF CLUSTER SCIENCE},
 month = {},
 note = {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., The original publication is available at http://www.springerlink.com/content/l3754l4qj43w6hv5/, text, application/pdf},
 pages = {845--853},
 title = {Catalytic hydration of alkynes over bronsted acid sites developed on halide clusters},
 volume = {18},
 year = {2007},
 yomi = {チハラ, テイジ}
}