Nonintegral Elliptical Orbital Studies on H2+, H2, and HeH+

Calculations are performed on the 2Σg+ and 2πu bound states of H2+ and the ground states of H2 and HeH+ using a basis set of nonintegral elliptical orbitals. The H2+ calculations are in the form of a single-configuration wavefunction while both self-consistent-field and configuration-interaction studies are carried out on H2 and HeH+.