Despite the studies on the Pi<--Pi band system corresponding to B-1(2
u)<--(1)A(1g) (lambda=2600 Angstrom) in tri-substituted benzenes (Aral
akkanavar el al., Spectrochim. Acta 48A, 983 (1992) and references men
tioned therein), the available data are limited. The vapour phase elec
tronic absorption spectra of 2,4-, 2.5-, 3,4- and 3,5-difluorophenols
are reported and interpreted.