The atom dipole interaction model of Raman optical activity: Reformulation and comparison to the general two-group model

The atom dipole interaction (ADI) model of Raman optical activity (ROA) is reformulated and the ADI expressions for the induced polarizabilities are presented in Cartesian tensor notation. These revised expressions are compared with those of the general two-group (GTG) model. It is shown that the ADI model incorporates antisymmetric tensor contributions to the polarizability which is an important source of optical activity not included in the GTG model. The ROA intensity parameters for the HCBrClF and DCBrClF are presented and the importance of the antisymmetric tensor contributions in this molecule is demonstrated.