High-Resolution Fourier Transform Infrared Spectrum of the ν12 Fundamental Band of Ethylene (C2H4)

High-resolution FTIR spectrum of the ν12 band of ethylene-d (C2H3D)

“…The upper state rovibrational constants A, B, D J , D K , d J , and d K of m 12 band of C 2 H 3 D as given in Table 1 are found to be greater than the corresponding ground state values, while the constants C and D JK are lower than those of ground states. These trends in sign are in good agreement with those in the m 12 band of C 2 H 4 [8]. This result indicates similarity in the rotational structures of the m 12 bands of both ethylene molecules.…”

“…The inertial defect D 12 of 0.20928(2) lÅ 2 of C 2 H 3 D derived from the present analysis, as given in Table 1 is less than that of C 2 H 4 [8] which is 0.24201(2) lÅ 2 ; and that of trans-C 2 H 2 D 2 [13] which is 0.29967(2) lÅ 2 ; and also that of cis-C 2 H 2 D 2 [15] which is 0.24820(2) lÅ 2 . The upper state rovibrational constants A, B, D J , D K , d J , and d K of m 12 band of C 2 H 3 D as given in Table 1 are found to be greater than the corresponding ground state values, while the constants C and D JK are lower than those of ground states.…”

“…The spectra of the m 12 band of C 2 H 3 D were recorded using a Bomem DA3.002 Fourier transform spectrophotometer [8][9][10][11], with a unapodized resolution of 0.004 cm À1 . A Globar infrared source, and a high sensitivity liquid nitrogen cooled HgCdTe detector, and KBr beam splitter were used.…”

“…In this work [6], accurate rotational and centrifugal distortion constants in the ground state were determined, and the average structure of C 2 H 3 D molecule was also calculated. Most of the recent high resolution (at 0.004 cm À1 or better) FTIR studies on the ethylene molecules were focussed on C 2 H 4 [7,8], C 2 D 4 [9][10][11], trans-C 2 H 2 D 2 [12,13], cis-C 2 H 2 D 2 [14,15], and 1,1-ethylene-d 2 [16]. However, FTIR spectroscopic works on C 2 H 3 D at resolution of 0.004 cm À1 or better have not been reported so far.…”

First theoretical global line lists of ethylene (12C2H4) spectra for the temperature range 50−700 K in the far-infrared for quantification of absorption and emission in planetary atmospheres

“…In the entire data set, spectral analyses remain quite sparse: of the 200 vibrational bands up to 4000 cm −1 , only 16 were completely or partially modeled. Many line-by-line analyses have focused on the 10 µm region using spectroscopic empirical models (Blass et al 2001;Rotger et al 2008;Vander Auwera et al 2014;Tan et al 2000;Ulenikov et al 2013); Alkadrou et al (2016), either for each band individually or simultaneously for the so-called tetrad ν 10 /ν 4 /ν 7 /ν 12 . Analyses of high-resolution Fourier transform spectra in the 4.3−5.6 µm region were reported by Lafferty et al (2011), Ben Hassen et al (2012.…”