The predictive performances for maximum absorption wavelength of the PBE, BP86, PBE0, B3LYP, M06, M06- 2X, CAM-B3LYP, LC-wPBE, APDF, wB97XD, and PW6B9D3 functionals have been benchmarked through comparison of maximum absorption wavelength values between calculation and experiment of 21 coumarin derivatives. |