The ν4 fundamental bands of trans- and cis-HNO2

The 14–22μm absorption spectrum of nitrous acid studied by high-resolution Fourier-transform spectroscopy: New analysis of the ν5 and ν6 interacting bands of trans-HONO and first analysis of the ν6 band of cis-HONO

“…This is because, in our spectra, the m 5 band center for cis-HONO is unfortunately masked under the strong lines from the m 5 and m 6 bands of trans-HONO. We asked to Michel Herman and Jean-Michel Guilmot [10][11][12] for the communication of their HONO spectra which were recorded with significant lower (pressure · path length) product as compared to the spectra recorded during the present study. Unfortunately, it was not possible in that case also to identify the m 5 band of cis-HONO.…”

“…In the past, rather complete rotational studies have been performed for the m 1 , m 2 and m 4 fundamental bands for trans-HONO and cis-HONO as well as for the m 3 band of trans-HONO [8][9][10][11][12]. However, except for the m 4 band for which no noticeable perturbation was observed [10][11][12], these analyses were complicated for both isomers due to numerous vibrational -rotational resonances [10,11,13].…”

“…However, except for the m 4 band for which no noticeable perturbation was observed [10][11][12], these analyses were complicated for both isomers due to numerous vibrational -rotational resonances [10,11,13].…”

The υ1 fundamental bands of trans- and cis-DONO studied by high-resolution Fourier-transform spectroscopy

“…Other high-resolution studies and analysis of infrared fundamental bands of HONO or DONO are described in Refs. [3][4][5][6][7][8]. In particular, the t 3 , t 4 , t 5 , and t 6 fundamental bands of trans-DONO, and the t 4 fundamental band of cis-DONO, were studied by Halonen et al [3] using high-resolution Fourier-transform infrared spectroscopy.…”

The far-infrared rotational spectrum of nitrous acid (HONO) and its deuterated species (DONO) studied by high-resolution Fourier-transform spectroscopy

“…Between 1980 and 1984, high-resolution Fourier-transform infrared spectra of the infrared bands of trans-and cis-HONO (and trans-and cis-DONO) were recorded and analyzed (see [15,16] and references therein). Later in 1991-1993, a full rovibrational analysis of the m 1 , m 2 , m 3 , and m 4 of trans-HONO and of the m 1 , m 2 , and m 4 bands of cis-HONO [17][18][19] yielded an improved set of rovibrational parameters, including a first determination of the equilibrium rotational constants of trans-HONO.…”