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bifunctional catalysis definition
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Catalysis (usually for hydron transfer) by a bifunctional chemical species involving a mechanism in which both functional groups are implicated in the rate-controlling step, so that the corresponding catalytic coefficient is larger than that expected for catalysis by chemical species containing only one of these functional groups.

The term should not be used to describe the concerted action of two different catalysts ("concerted catalysis").

See also:
BGA definition
beta distribution definition
basicity function definition
Biocatalyst definition
Bioisostere definition
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