Figure 5 gives a comparison of the structures of 3bdja model molecule including Mo4+ ion, where the black lines are the structure optimized by MP2/6-31G(d,p) method where Mo4+ ion in 3bdja model molecule was treated by MP2/LANL2DZ method in Gaussian 03, and the green lines are the structure optimized by ABEEMσπ fluctuating charge force field.