*p** electron bond order*

We can also define a quantity which
measures the __strength of a ____p____-electron bond between two atoms__. This quantity depends on the electron
density which is __shared__ between two atoms.

To calculate the p-bond order between a pair of atoms, add together the
contributions to bonding from all the occupied p MOs.

p electron bond
order for *a*-*b* bond (*p _{ab}*):

_{}

again *n _{i}* is the number
of electrons in molecular orbital

_{}