The A¹Π ∼ D¹Δ rotation-electronic interaction in CO

Abstract

All available experimental data pertinent to the A ¹Π (v = 0-4) and D ¹Δ state of CO have been used to derive five independent values for the rotation-electronic interaction parameter b(A ∼D). The experimental values concern a narrow R centroïd region (1·21 < R < 1·32 Å). The mean value b(A ∼D) = 0·12 ± 0·01 is much smaller than the value (0·48) predicted by ab initio SCF-CI calculations which have been carried out for several internuclear distances. The experimental and calculated values for the A ¹Π ∼I ¹Σ^- and a ³Π ∼ a′³Σ⁺, e ³Σ^-, d ³Δ rotation-electronic perturbations available in the literature are also discussed.

Additional information

Notes on contributors

Joël Schamps

Laboratoire Associé à l'Université de Paris-Sud.