Mc. Caputo et Mb. Ferraro, DESCRIPTION OF THE GAUGE-INVARIANCE OF MOLECULAR MAGNETIC-PROPERTIES OF THE SF6 MOLECULE, Journal of molecular structure. Theochem, 364(1), 1996, pp. 69-77
Ab initio calculations of the magnetic susceptibility and the nuclear
magnetic shielding tensor for the SF6 molecule are reported here. Thei
r dependence on the choice of gauge for the vector potential, which de
scribes the external magnetic field, is discussed. The required invari
ance of molecular magnetic properties depends on the fulfillment of ve
ry general gauge-invariance sum rules and on the quality of the basis
set employed.