Physical Chemistry Chapter VI Interaction between Molecules,2 (3)Dispersion interaction Transient dipole interactions 1930----London E4=-[12(1+l2)aa2/(4xen)2R”] 2021821 Chemistry Departme nt of Fudan UniversityPhysical ChemistryI Chapter VI Interaction between Molecules 2021/8/21 Chemistry Department of Fudan University 6 (3) Dispersion interaction Transient dipole interactions 1930----London 2 6 d 1 2 1 2 1 2 0 3 [ /( )][ / 4 ] 2 E I I I I R = − + a a  （ ）