S. Dewar and HC Longuet-Higgins, froc. R. SOC., Ser. A, 214, 482 (1952); NS Ham and K. Ruedenberg, J. Chem. Phys., 29, 1215 (1958); NS Ham, ibid., 29, 1229 (1958); E. Heiibronner, Helv. Chim. Acta, 45, 1722 (1962): JR Platt in" Handbuch der Phvsik". Voi. XXXViI/PS algorithm is justified in future theoretical work, that previous conclusion may require modification. No explicit electronic charge effects are included in a structure- ...