Descripción: A scheme for resolving average optical rotatory power of a molecule into atomic contributions, applied to hydrogen peroxide, is presented. The scheme is based on the acceleration gauge for the electric dipole, and the torque formalism. Calculations are carried out to test the reliability of the partition method. The force and torque gauges provide different numerical values for atomic contributions.

Descripción: We applied a methodology capable of resolving the optical rotatory power into atomic contributions. The individual atomic contributions to the optical rotatory power and molecular chirality of the methylhydroperoxide are obtained via a canonical transformation of the Hamiltonian by which the electric dipolar moment operator is transformed to the acceleration gauge formalism and the magnetic dipolar moment operator to the torque formalism. The gross atomic isotropic contributions have been evaluated for the carbon, the nonequivalent oxygen, and the nonequivalent hydrogen atoms of methylhydroperoxide, employing a very large Gaussian basis set which is close to the Hartree-Fock limit. © 2008 American Institute of Physics.