Relativistic coupled-cluster calculations including single and double excitations are reported for the ground states of He, Be, Ne and Ar. The no-pair Dirac-Coulomb Hamiltonian is taken as the starting point. The reference state of the single determinant Dirac-Fock wavefunction is calculated in a ba
Relativistic Dirac–Fock calculations for closed-shell molecules
✍ Scribed by L. Pisani; E. Clementi
- Publisher
- John Wiley and Sons
- Year
- 1994
- Tongue
- English
- Weight
- 663 KB
- Volume
- 15
- Category
- Article
- ISSN
- 0192-8651
No coin nor oath required. For personal study only.
✦ Synopsis
A new code has been written to perform relativistic Dirac-Fock self-consistent field (SCF) calculations on closed-shell molecules of any symmetry. The choice of the basis set allows us to work at different levels of approximation depending on the precision required. Calculations on the H2Po molecule show that accurate results on specific problems like geometry optimization can be obtained by evaluating the two-electron integrals on half the basis spinors. 0 1994 by John Wiley & Sons, Inc.
📜 SIMILAR VOLUMES
## Relativistic and non-relativistic Hartree-Fock calculations including npr,a and npa,a orbitals in the valence MO are reported for the molecules BH, AIH, GaH, InH and TlH. The relativistic contraction of the bond length reaches 7.0% for TIH. Relativistic effects make the chemical bond stronger f