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Studies of coupled chemical and catalytic coal conversion methods [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 1991.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
Pages: (12 pages) : digital, PDF file
Additional Creators
University of Chicago, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
When an arene is coordinated to Cr(CO)₃, profound changes in its reactivity occur. Ring and benzylic hydrogen atoms exhibit enhanced acidity, and typical arene reactions such as electrophilic aromatic substitutions are quenched. In contrast, the ring carbon atoms are activated toward attack by nucleophiles. These changes in reactivity are manifestations of the forceful electron withdrawing nature of the Cr(CO)₃ component, and of the ability of this group to stabilize charged intermediates. In addition, arenechromium tricarbonyl complexes have been proven to be good catalysts in the hydrogenation of dienes. While most simple complexes such as toluenechromium tricarbonyl require the use of high temperatures and dihydrogen pressures, arenechromium tricarbonyl complexes with napthalene, anthracene, and phenanthrene show remarkable activity under extremely mild conditions. An investigation has been under way in which the chemistry of coal arene-Cr(CO)₃ complexes have been studied. 4 figs.
Report Numbers
E 1.99:doe/pc/79938-t6
doe/pc/79938-t6
Subject(s)
Other Subject(s)
Note
Published through SciTech Connect.
01/01/1991.
"doe/pc/79938-t6"
"DE92000333"
Stock, L.M.
Funding Information
AC22-87PC79938
View MARC record | catkey: 13842419