Ro-vibrational analysis of the hot bands of 13C2H4: v7 + v10 - v10 and v10 + v12 - v10

Two "hot" absorption bands, v(7) + v(10) - v(10) and v(10) + v(12) - v(10), of (C2H4)-C-13 were recorded for the first time with a Bruker high resolution Fourier transform spectrometer and theoretically analyzed. About 640 and 270 transitions (168 and 136 upper state ro-vibrational energy values) with J(max) = 20, K-a(max) = 10 and J(max) = 23,K-a(max) = 9 for the bands v(7) + v(10) - v(10) and v(10) + v(12) - v(10), respectively, were assigned. For that purpose strong local resonance interactions with ten other closely located vibrational states were taken into account. A set of 36 varied parameters was obtained from the fit, which reproduces the initial experimental data with the rms deviation of 6.7 x 10(-4) cm and which is close to experimental uncertainties. (C) 2015 Elsevier Inc. All rights reserved.