In an effort to unify the above described equations the Mayr equation is rewritten as:
with s the electrophile-dependent slope parameter and s the nucleophile-dependent slope parameter. This equation can be rewritten in several ways:
* with s = 1 for carbocations this equation is equal to the original Mayr–Patz equation of 1994,
* with s = 0.6 for most n nucleophiles the equation becomes
:or the original Scott–Swain equation written as:
* with s = 1 for carbocations and s = 0.6 the equation becomes:
:or the original Ritchie equation written as: