Mol. Phys. 81, 813-824 (1994)
(Received 5 July 1993; accepted 14 September 1993)
A new derivation is presented for the orientation-dependent interaction tensors which describe the electrostatic interaction between two multipole or multipole polarizability distributions both given in their own molecule-fixed coordinate system. This derivation leads to an explicit equation that allows an easy and direct evaluation of formulae for the components of the double-tensors also for higher ranks. Such an equation is given for the real, for the complex spherical and for the cartesian moments. The formula is suitable to provide stable computer-generated expressions for tensor operators of any rank.
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