Elementary reactions involving two reactants called Bimolecular reactions.
An elementary reaction is a reaction that occurs in a single step. One or more chemical species react directly to form products in a single reaction step and with a single transition state. Elementary reactions are generally classified in terms of the number of reactant molecules involved, known as the reaction’s molecularity. The rate law for an elementary reaction can be derived from the coefficients of the reactants in the balanced equation.
For example, the rate law for the elementary reaction
2A + B → products
rate = k[A]²[B].
- Two reactant molecules collide with one another in a bimolecular reaction.
- F– + CH3Cl → CH3F + Cl–