Abstract
An ab initio calculation of the spin-other-orbit and spin-spin interactions in the c 3Πu(1s,2p) state of molecular hydrogen has been made. This calculation utilized the wavefunction obtained with the optimal double configuration model by Zemke, Lykos, and Wahl. The coupling constants are in good agreement with those calculated by Lombardi using the 45–50 configuration elliptic coordinate wavefunction of Rothenberg and Davidson.