The Isomers of Hypofluorous Acid, FHO and HFO

Both species are predicted to be metastable and to represent local minima of an analytical potential function [1], see p. 138 and Fig. 3, p. 139. 

The molecular vibrations were calculated from a potential surface by a variational procedure due to [2]. For the 0 - F stretching mode the bending mode vg, and the H atom vibration between the heavy atoms V3, the wavenumbers 454, 605, and 3319 cm were obtained [1]. An extension of that potential function by inclusion of parameters calculated previously [1] for FHO and HFO which correspond to local minima on that potential surface gave Vi = 439, V2 = 555, and V3 = 3897 cm [3]. In both cases V2 is taken as one-half of the energy of the (02°0) vibrational level. 

---