Vacuum ultraviolet absorption spectra of chlorofluoromethanes from 120 to 65 nm

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Abstract
The far ultraviolet absorption spectra of CF3Cl, CF2Cl2, CFCl3, CF2HCl, CFH2Cl, and CFHCl2 have been measured from 120 to 65 nm (∼80 000 to 160 000 cm−1). The observed bands can be accounted for as Rydberg bands related to the first and higher ionization potentials. Several discrete bands are superimposed on the ionization continuum. Between 70 000 and 90 000 cm−1 the bands are due to Rydberg transitions departing from orbitals of the chlorine lone pair type, between 90 000 and 105 000 cm−1 to transitions from orbitals of the C–Cl bonding type, and at higher frequencies to transitions from orbitals of the fluorine lone pair and C–F bonding type.

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