Abstract
The intramolecular OH· · ·π interactions of the phenolic and olefinic chromophores in o-propenyl and o-butenyl phenols 1a–d in the ground and excited states have been studied by (a) ab initio Hartree–Fock calculations using the 3-21G and 6-31G** basis sets, (b) FTIR spectral measurements in the gas phase, (c) fluorescence emission studies and (d) product studies. Such interactions appear to play a key role in the photochemical behaviour of the four compounds.
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