A b i n i t i o effective spin-orbit operators for use in atomic and molecular structure calculations. Results for CH, OH, SiH, CO+, CO, and SiO

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Abstract
Ab initio effective spin‐orbit operators, based on relativistic effective core potentials, are used to determine the spin‐orbit coupling constants for CH(X 2Πr), OH(X 2Πi), SiH(X 2Πr), CO+(A 2Πi), CO(a 3Πr), and SiO(b 2Πr). In comparison with experimental and ab initio values all electron values are very favorable.