“…Although the spectra were heavily blended, -splittings on the order of 0.03 cm Ϫ1 were identified. The origin of the (v 6 ϭ 2 4 0) band was determined to be 423.150 (15) cm Ϫ1 , in agreement with the earlier, less accurate determination of 423.25 cm Ϫ1 made in a lower resolution study of this band (5). From the intensity analysis of the torsional overtone, the effective transition dipole moment 0,eff T has been determined.…”