STRUCTURE OF Q-BRANCHES IN INFRARED-ACTIVE FUNDAMENTAL-TYPE BANDS OF SPHERICAL-TOP MOLECULES

In the absence of strong accidental resonance, the detailed energy-level structures of all Q branches of infrared-active fundamental-type bands in spherical-top molecules are prescribed, in the first approximation, by the value of the single parameter, β = v g, where v = ΔBeffQ and g is the tetrahedral or octahedral splitting constant. The Q branches of several heavy and light spherical tops are examined in this context, using energy-level diagrams, level cluster analysis, and computer graphics to simulate the superpositions of hundreds of absorption lines. © 1979.