Collisional Broadening of the J=7 ⇐ 6 Transition of t-Butyl Cyanide by CH₃CN, OCS, CO₂and Helium

Abstract

Experimental studies of the broadening of the absorption line J = 6 7 of (CΗ3 )3 CCΝ due to collisions with the foreign perturbers He, CO2, OCS, and CΗ3CΝ have been carried out. The magnitude of the broadening coefficients reflects the type of interactions occurring in the molecular collisions. It has been concluded that the dipole-dipole and dipole-quadrupole interactions are predominant in the (CH3)3CCN admixed with CΗ3CΝ and OCS. In the collisions between (CΗ 3 )3 CCΝ and CO2 the dipole-quadrupole interactions are present whereas the He perturbed by (CΗ 3 ) 3 CCΝ exhibits dispersive type of interactions.