Abstract
Measurements of the electronic absorption spectra of vapor- and solution-phase salicylaldehydes are reported for wavelengths ≥1900 Å. Three intense absorption band systems are readily assigned as A′ (ππ ∗) ← 1 1A′ transitions by comparison with all-valence-electron computations. Moderate vibrational structure in the 3 1A′ (ππ ∗) ← 1 1A′ transitions of isotopic salicylaldehydes is analyzed and tentative assignments are made for the coupled vibrations.
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