Spj. Rodrigues et Ajc. Varandas, On the variation of the electric quadrupole moment with internuclear distance and the atom-diatom long-range electrostatic interaction energy, PCCP PHYS C, 2(4), 2000, pp. 435-439
The electric quadrupole moment of several first-row diatomic hydrides has b
een calculated as a function of the internuclear distance. The calculated v
alues have been fitted to a general analytical function which covers from t
he united-atom to the separated-atoms limits. A discussion on the atom-diat
om electrostatic interaction energy is presented, and the validity of the c
lassical optimized quadrupole moment method tested.