High-resolution Fourier transform infrared spectroscopy and analysis of the ν12 fundamental band of ethylene-d4

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

“…2. A detailed section of the P branch region of C 2 H 3 D. [8] and 12 C 2 D 4 [9] was also employed to fit the assigned transitions of m 12 of C 2 H 3 D. This program for fitting asymmetric rotor spectra uses a Watson Hamiltonian [18] with an I r representation in an A-reduction. Ground state rovibrational constants of C 2 H 3 D inclusive of all five quartic terms were initially taken from Hirota et al [6].…”

“…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.…”

The ν12 band of ethylene-1-13C (13C12CH4) by high-resolution FTIR spectroscopy

“…Furthermore, many higher resolution infrared measurements and analyses [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] of the fundamental, overtone, and combination bands of these molecules were conducted mainly to study their rovibrational structures and to determine their rotational and higher order constants with high accuracy. Most of the latest high-resolution FTIR studies are centred on 12 C 2 H 4 [7,17], 12 C 2 D 4 [8,9,[14][15][16], trans-12 C 2 H 2 D 2 [10,19], cis-12 C 2 H 2 D 2 [11,18], 1,1-ethylene-d 2 [20,21], and 13 C 2 H 4 [22]. However, infrared spectroscopic studies on 13 C 12 CH 4 remain very limited.…”

“…Likewise, we had studied the m 12 bands of 12 C 2 D 4 [14], of cis-12 C 2 H 2 D 2 [18], of trans-12 C 2 H 2 D 2 [19], of 13 C 2 H 4 [22] and of 12 C 2 H 3 D [25] at high-resolution to improve on or to derive new ground and m 12 = 1 rovibrational constants. The present work is aimed at the analysis of the m 12 band of 13 C 12 CH 4 which was measured with a resolution of 0.0063 cm À1 .…”