Analytic Computationof Vibrational Circular DichroismSpectra Using Second-Order Møller–Plesset PerturbationTheory

We present the first analytic-derivative-based formulation of vibrational circular dichroism (VCD) atomic axial tensors for second-order Mo̷ller–Plesset (MP2) perturbation theory. We compare our implementation to our recently reported finite-difference approach and find close agreement, thus validating the new formulation. The new approach is dramatically less computationally expensive than the numerical derivative method with an overall computational scaling of O(N6). In addition, we report the first fully analytic VCD spectrum for (<i>S</i>)-methyloxirane at the MP2 level of theory.