Knowledge Bank

Calculations of vibrational rotational strengths using the multiple equations discussed in the previous paper at the SCF level are reported for a range of small, chiral molecules including NHDT, $NH2.NH2$ and trans-dideuteriocyclopropane. The basis set and origin dependence of the results and their accuracy relative to the Hartree-Fock limit are discussed. The relataive accuracies of different equations for rotational strengths are compared. The degree to which the P.RxP, FPC and CO equations are reliable approximations is examined.