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Table 2 Calculated low-energy singlet excitation energies, wavelengths, and oscillator strengths (f) for CHA (P1) using TD-B3LYP/6-311G** level.

From: Understanding the decomposition reaction mechanism of chrysanthemic acid: a computational study

Type Oscillator strength (f) Wave length(nm) Excitation energy (eV) Coefficients Contributions
Singlet-1 0.195 335.88 5.912 0.655 HOMO-1 - > LUMO
     0.445 HOMO - > LUMO
Singlet-2 0.0567 291.7 5.727 0.549 HOMO-1 - > LUMO
     0.431 HOMO - > LUMO
Singlet-3 0.037 285.91 6.003 0.658 HOMO-1 - > LUMO