The v2=v6 = 1 (∼936.5 cm−1) vibrational level of chloroform CH35Cl3 has been studied for the first time by high-resolution FTIR and millimeter-wave spectroscopy. Like the v6 = 1 and v3=v6 = 1 vibrations, the v2=v6 = 1 level is characterized by an exceedingly small value of |C − B − Cζ| ≈ 2.88  × 10−3 cm−1. Hence, a global l(2,2) resonance connects the (k − 1, l6 = −1) and (k + 1, l6 = +1) sublevels. This quasi-generalized l(2,2) resonance is almost exclusively responsible of the appearance of the ν2 + ν6 combination band, with its Q-branches falling in a narrow region close to the band origin, together with its, partially resolved, clusters of K-lines on the P and R sides of the spectrum, for each value of J.

For the first time the experimental study of the complexation of acrylonitrile molecule (CH 3 =CHCN, noted AN) with water has been undertaken from a vibrational point of view as well as the homodimer (AN) 2 in solid neon from 80 to 6000 cm-1 using Fourier transform infrared spectroscopy...

The Q-branch of the ν1+ν3+3ν4 cold band of 12C2H2 located at 8330 cm−1 has been observed under one kilometer absorption path length. The analysis leads to a line list for this isolated and strong Q-branch that is missing from spectroscopic databases. This work completes the large update of acetylene data in the ΔP = 13 spectral region (8200 and 8900 cm−1) made in spectroscopic databases (HITRAN and GEISA) in 2020 edition.

The reaction of ketene (H2CCO) with hydrogen atoms has been studied under interstellar conditions through two different experimental methods, occurring on the surface and in the bulk of H2CCO ice. We show that ketene interaction with H-atoms at 10 K leads mainly to four reaction products, carbon monoxide (CO), methane (CH4), formaldehyde (H2CO) and acetaldehyde (CH3CHO)...

The photodecomposition of ketene under interstellar conditions and how the resulting photofragments may recombine in the 3-300 K temperature range could play an important role in investigations related to astrochemistry and astrobiology. Using a combination of bulk ice and rare-gas matrix isolation studies coupled to Fourier transform infrared (FTIR) spectroscopy, this work aims to understand the vacuum ultraviolet (VUV) photochemistry of CH2CO in solid phase to mimic the photochemistry of organic species trapped in the icy interstellar grains. We show that the photolysis of CH2CO depends strongly on the environments where it is trapped...

The Fourier transform IR spectra of samples prepared by mixing two gaseous species 18O2/14N16O (1:2) have been recorded in the region of the ν3 band of nitrogen dioxide. The spectra contain the lines corresponding to the ν3 band of the 16O14N18O isotopologue within the 1540–1640 cm−1. In total 1795 lines of the ν3 band of this isotopologue were assigned with the rotational quantum numbers N and Ka up to 51 and 12, respectively, what corresponds to 3487 electron spin-rotation-vibration transitions...

Methyl formate (MF) is an important interstellar medium molecule and it has been the subject of several theoretical and experimental studies in literature. The experimental study of the complexation of this molecule with water has never been undertaken from a vibrational point of view as well as the homodimer (MF) 2...