At 300 K, the following reaction is found to obey the rate law of Rate = k[NOCl]₂:

2 NOCl(g) -> 2 NO(g) + Cl₂(g)

The following reaction mechanism has been proposed for the reaction above:

Proposed Mechanism:

O NOCl(g) -> NO(g) + Cl(g) slow
O Cl(g) + NOCl(g) -> NOCl₂(g) fast
O NOCl₂(g) -> NO(g) + Cl₂(g) fast