Abstract: The formulation is developed by which the values of Group Overlap Integrals(GOIs) between orbitals of the central atom and ligands'orbitals in a coordination compound can be carried out. GOIs whose orbitals are transformed under molecular point groups are rewritten as those only under rotational point groups on condition that there exists a simple relation between the two types of GOIS. The calculations using Angular Overlap Model on GOIs are simplified.

Key words: Group Overlap Integrals, Molecular and rotational point groups, Angular overlap model