Dependence of the total π-electron energy on a large number of non-bonding molecular orbitals

Abstract

Using a recently developed method for computing the effect of non-bonding molecular orbitals (NBMOs) on the total π-electron energy (E), it was found that the dependence of E on the number n 0 of NBMOs is almost perfectly linear. We now show that this regularity remains valid for very large values of n 0 , in particular, to hold up to n 0 = 20.