Average and directional Compton profiles for the O2 and CH2O molecules. II. Anisotropy in the momentum charge distribution

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Abstract
The average Compton profiles and the profiles along various directions are obtained for the occupied canonical orbitals of the ground state of the oxygen and formaldehyde molecules. It is demonstrated that the oscillatory nature of the profiles calculated along the bond direction in a homonuclear diatomic molecule is strictly a consequence of molecular symmetry. The information extracted from these profiles give insight into the nature of the molecular orbitals comparable to that obtained from the electron density plots in coordinate space for formaldehyde. The profiles for individual orbitals are then used to explain the anisotropy in the total momentum distribution of the molecules which occurs upon chemical bonding.