M.-T. BOURGEOIS, M. ROTGER, Groupe de Spectrométrie Moléculaire et Atmosphérique, CNRS UMR 7331, Université de Reims Champagne-Ardenne, Moulin de la Housse, B.P. 1039, Cases 16-17, F-51687 Reims Cedex, France; M. TUDORIE, J. VANDER AUWERA, Service de Chimie Quantique et Photophysique, C.P. 160/09, Université Libre de Bruxelles, 50, avenue F. D. Roosevelt, B-1050 Brussels, Belgium; V. BOUDON, Laboratoire Interdisciplinaire Carnot de Bourgogne, CNRS UMR 6303, Université de Bourgogne, 9, Avenue Alain Savary, BP 47870, F-21078 Dijon Cedex, France.
New high resolution IR spectra of the 10/ 7/ 4 region, lying from 600 cm-1 to 1200 cm-1 have been recorded in Brussels. They are used simultaneously with a previous spectrum of the 12 band, also recorded in Brussels, to perform the analysis of the 10/ 7/ 4/ 12 region, lying from 600 cm-1 to 1500 cm-1. Following our work devoted to the 12 band considered as isolated, we performed a frequency re-analysis of the 10/ 7/ 4/ 12 infrared tetrad in the 600 - 1500 cm-1 region, thanks to the tensorial formalism developed in Dijon for X2Y4 asymmetric-top molecules and the XTDS software package. Including the strong Coriolis interaction affecting the upper vibrational levels 101, 71, 41 and 121, a total of 11727 lines have been assigned and fitted as a tetrad with a global root mean square deviation of 0.338 × 10-3 cm-1.