Relativistic Effects in Diatomic Molecules: Evaluation of One-Electron Integrals

Abstract
One‐ and two‐center matrix elements over the kinetic‐energy‐shift, the spin–orbit, the Dirac, and the Fermi‐contact operators are evaluated for arbitrary combinations of Slater orbitals. The analysis is compatible with previous treatments of the two‐electron Breit–Pauli operators.