J. Styszynski et al., RELATIVISTIC ALL-ELECTRON DIRAC-FOCK-BREIT CALCULATIONS ON XENON FLUORIDES (XEFN, N=1, 2, 4, 6), Journal of computational chemistry, 18(5), 1997, pp. 601-608
The MOLFDIR package of programs is used to perform fully relativistic
all-electron Dirac-Fock and Dirac-Fock-Breit calculations for the the
XeFn (n = 1, 2, 4, 6) molecules assuming experimental symmetries. The
Xe-F bound length for XeF2, XeF4, and XeF6 is optimized and the total
ground-state energies are reported. The variation of the relativistic
energy and the Breit correction with the internuclear distance is plot
ted. The role of relativistic corrections in the proper prediction of
the Xe-F distance and the dissociation energy of the molecule is discu
ssed. The problem of the reduction of the number of scalar two-electro
n integrals is studied. Our results illustrate the possibilities, diff
iculties, and limitations of the finite basis Dirac-Fock calculations
for polyatomic molecules of different symmetries. (C) 1997 by John Wil
ey & Sons, Inc.