Molecular calculations with two-center correlated orbitals Academic Article uri icon


  • The usual building blocks of molecular orbital theory are one-center atomic orbitals. If we instead use two-center orbitals derived from the exact solution for H+2, a simple calculation of the H2 binding energy yields 4.5 eV, with a Hylleraas correlation factor having no adjustable parameters. Variational minimization with respect to a couple of parameters in our trial function then shifts the binding energy to 4.7 eV, very near the experimental value. The approach is also applicable to heteronuclear molecules; e.g., HeH+, whose ground state energy we calculate to be -2.96 hartree with no adjustable parameters. This is to be compared with -2.98 hartree previously calculated using a wavefunction with 83 terms. 2004 Elsevier B.V. All rights reserved.

published proceedings


author list (cited authors)

  • Scully, M. O., Allen, R. E., Dou, Y. S., Kapale, K. T., Kim, M., Chen, G., & Svidzinsky, A.

citation count

  • 8

complete list of authors

  • Scully, MO||Allen, RE||Dou, YS||Kapale, KT||Kim, M||Chen, G||Svidzinsky, A

publication date

  • May 2004