1 | A1+E1⇌k−1k1E1A | r1=k1⋅[A]1⋅[E1] | r−1=k−1⋅[E1A] | RTln (r1/r−1) |

2 | E1A⇌k−2k2E2A | r2=k2⋅[E1A] | r−2=k−2⋅[E2A] | RTln (r2/r−2) |

3 | E2A⇌k−3k3A2+E2 | r3=k3⋅[E2A] | r−3=k−3⋅[A]2⋅[E2] | RTln (r3/r−3) |

4 | E2⇌k−4k4E1 | r4=k4⋅[E2] | r−4=k−4⋅[E1] | RTln (r4/r−4) |

overall | A1⇌A2 | [r1r2r3r4/denominator] | [r−1r−2r−3r−4/denominator] | RTln ([A]1/[A]2) |

| where, following Boudart [1], the denominator=r2r3r4+r−1r3r4+r−1r−2r4+r−1r−2r−3. |