Knowledge Bank

Multi-configuration Hartree-Fock calculations have been carried out for the ground states of CF and $CF+$ and for a number of excited valence and Rydberg states of CF. A near Hartree-Fock basis of Slater functions has been used. Configurations have been included which provide a correct description of the CF bond at all internuclear distances and an improved description of the carbon lone pair. Excitations from the latter are primarily responsible for the low-lying excited states. Calculated excitation energies agree very well with values calculated earlier by Richards and $Hall1$ at a single internuclear distance. The calculated potential curves provide some assistance in interpreting the observed absorption spectrum, especially in regions of expected perturbations.