Definition: a reaction involving a single molecule (decomposition, intramolecular rearrangement, intramolecular oxidation or reduction), even if a catalytic agent, such as acid or alkali, is present in large excess, on a molecular basis, or is not rate-determining; such reactions are usually first-order reactions.
Synonym(s): unimolecular reaction
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Examples: glitazone, GI cocktail, etc.
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