A series of quantum mechanical sum rules arising from application of the virial theorem to the electrons of a molecule in the presence of electric and magnetic fields has been obtained. The virial constraints are written in terms of nuclear shielding tensors related to geometrical derivatives of second- and third-order molecular properties.
Quantum-mechanical virial sum rules for a molecule in electric and magnetic fields / Lazzeretti, Paolo. - In: GAZZETTA CHIMICA ITALIANA. - ISSN 0016-5603. - STAMPA. - 126:(1996), pp. 285-288.