Ro-vibrational analysis of the hot bands of (C2H4)-C-13: v(7) + v(10) - v(10) and v(10) + v(12) - v(10): ^{ν 7} + ^{ν 10} - ^ν10and ^ν10+ ^ν12- 1^ν0

Two "hot" absorption bands, ^ν7+^ν10-^ν10 and ^ν10+^ν12-^ν10, of ¹³C₂H₄ 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 ^Jmax.=20,Kamax.=10 and ^Jmax.=23,Kamax.=9 for the bands ^ν7+^ν10-^ν10 and ^ν10+^ν12-^ν10, 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 6.7×10^-4 cm and which is close to experimental uncertainties.