## Wikipedia - Étape réactionnelle (fr) Wikipedia - 反応段階 (ja) reaction step

https://doi.org/10.1351/goldbook.R05178
An @E02035@, constituting one of the stages of a @S05970@ in which a @R05171@ (or, for the first step, the reactants) is converted into the next @R05171@ (or, for the last step, the products) in the @ST06775@ of intermediates between reactants and products.