The molecular response properties, i.e., polarizability and first hyperpolarizability, were calculated by both analytic derivatives of the system energy, namely, coupledperturbed Kohn-Sham (CPKS) , and finite field (FF) methods at the ωB97XD/aug-cc-pVTZ level. Five laser wavelengths commonly used in experiments (λ = 1907, 1460, 1340, 1180, and 1064 nm) together with zero-frequency limit case (λ = ∞ nm) were applied to examine the dispersion effect on the response properties of C 18 and