where the four terms in square brackets are intended to scale like R 0 pq , R 2 pq , R 4 pq , and R 6 pq , respectively, as in Eq. ( ) with n = 6. Instead, the expression in Eq. ( ) has been applied to the C 7 component of EFP dispersion, despite the absence of any term in the numerator with a distance dependence greater than R 4 pq . Furthermore, while the ansatz in Eq. ( ) does eliminate parameters from the damping function, it also makes the tacit assumption that all pairs of LMOs have the same Gaussian exponent, ζ. If centers p and q have different exponents α and β, then a more appropriate expression is