A study of the effect of circularly polarized light on NMR spectra and related properties of CS2

In a recent paper Buckingham and Parlett (1997, Molec. Phys., 91, 805) have shown that circularly polarized light produces an induced magnetic moment (in the inverse Faraday effect), and a magnetic field, whose intensity at t he nucleus K can be expressed in terms of a frequency dependent quadratic r esponse function, b((K))(omega). We present ab initio calculations of this property. The effect of circularly polarized light on the chemical shieldin g of C-13 and S-33 in carbon disulphide is studied within the multiconfigur ational SCF response approach. We discuss also the frequency dependence of the Verdet constant, V(omega). The ratio of the averaged b((K))(omega) to a lpha'(B-(0),omega)-which describes the effect of the magnetic field upon th e antisymmetric polarizability alpha'(omega) and is proportional to V(omega )-is computed, and compared to the ratio of the paramagnetic nuclear shield ing constant and the paramagnetic magnetizability, to ascertain the accurac y of the approximate relationship given by Buckingham and Parlett.