Many many thanks for your kind attention to make me guide with your highly valuable comments.

Sincerely yours,
Saeed

SCS-MP2 has much better performance in calculating reaction energies, see its original paper. However, SCS-MP2 is evidently poorer than popular double-hybrid functionals, therefore currently SCS-MP2 is not useful.

SCS-MP2 has worse accuracy in studying weak interactions. In addition, it was found that accuracy of evaluating reaction barrier is somewhat deteriorated compared to MP2.

Best,

Tian

Could you please let me know what is the advantage(s) of SCS-MP2 method with respect to the MP2 one? For instance, what is advantage of a SCS-MP2 wavefunction with respect to the MP2 wavafunction? Can we claim the SCS-MP2 geometry and energy is more accurate than the MP2 geometry and energy?
Finally, which of SCS-MP2 and MP2 takes into account the "electron correlation" and "dispersion effect" in a more accurate manner?

In advance, too many thanks for your kind attention and, valuable time and energy.

Sincerely yours,
Saeed