Affiliation:
1. Department of Chemistry and Biochemistry, University of Windsor, Windsor, Ontario N9B 3P4, Canada.
Abstract
Although reversible covalent activation of molecular hydrogen (H
2
) is a common reaction at transition metal centers, it has proven elusive in compounds of the lighter elements. We report that the compound (C
6
H
2
Me
3
)
2
PH(C
6
F
4
)BH(C
6
F
5
)
2
(Me, methyl), which we derived through an unusual reaction involving dimesitylphosphine substitution at a para carbon of tris(pentafluorophenyl) borane, cleanly loses H
2
at temperatures above 100°C. Preliminary kinetic studies reveal this process to be first order. Remarkably, the dehydrogenated product (C
6
H
2
Me
3
)
2
P(C
6
F
4
)B(C
6
F
5
)
2
is stable and reacts with 1 atmosphere of H
2
at 25°C to reform the starting complex. Deuteration studies were also carried out to probe the mechanism.
Publisher
American Association for the Advancement of Science (AAAS)
Reference37 articles.
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Cited by
1865 articles.
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