The ν6 band system of c3o2 near 540 cm-11

The infrared spectrum of the ν6 band system of carbon suboxide, C3O2, has been recorded between 500 and 600 cm-1 at a resolution of 0.002 cm-1. Altogether 23 bands have been assigned. They correspond to transitions ν6 + nν7 ← nν7, n ≤ 9, where ν6 is the asymmetric CCO bending mode and ν7 is the very anharmonic CCC bending mode. Among these bands, 20 have been rotationally analyzed and 1220 lines assigned. The line positions were fitted to effective parameters which characterize these 20 vibrational levels in the ν6 state. The results of the fits were then fitted so a semirigid bender model in order to determine the effective CCC bending potential function in the ν6 state. © 1994 Academic Press, Inc.SCOPUS: ar.j