COUPLED-CLUSTER CALCULATIONS OF VERDET CONSTANTS

We present the results of calculations of the Verdet constants for H-2 , N-2, C2H2 and CH4, within a recently implemented quadratic response function approach, for the hierarchy of coupled cluster models CCS, CC 2 and CCSD. For hydrogen, our FCI results are compared with experiment and with previous calculations of ''benchmark'' quality. The results for nitrogen and acetylene are compared with experiment and former the oretical investigations. For methane, this is the first ab initio stud y of the Verdet constant. (C) 1997 Elsevier Science B.V.