The accuracy of the SAC-Cl (symmetry-adapted-cluster configuration-interaction) method is examined for the singlet and triplet excited states of Hz0 by comparison with the full-Cl results for the [4s2p] basis set. The SAC-C1 results for the excitation energy agree with the full-Cl results to within
A comment on several results of CI calculations for H2O
β Scribed by W. Duch; J. Karwowski; G.H.F. Diercksen; S. Rettrup
- Publisher
- Elsevier Science
- Year
- 1988
- Tongue
- English
- Weight
- 172 KB
- Volume
- 144
- Category
- Article
- ISSN
- 0009-2614
No coin nor oath required. For personal study only.
β¦ Synopsis
CI calculations on Hz0 in a 6-21G frozen core and in a double-zeta basis are repeated using two different programs and two minor mistakes in the energy values reported by other authors are corrected.
π SIMILAR VOLUMES
Open shell SCF and internal CT1 calculations have been perforrucd for seven shakeup confiiuraticns of H20. SCF calculations WI aI least one ot lhc two doublet St;tiCS were carried out for each shake-up conf@uration. The internal Cl caIculations were pcrfurrued using appropriate MO's. In ;IIl configu
Full CI calculations are performed for ionized states, electronattached states and triplet excited states of HzO. The calcularions are compared with our recently developed SAC CI results. The trends of the results are found to be encoura\_ging.
The aupented random phase approximation [ARPA) in its wonzl form has heen employed to compute the liueer response fimction for the molecules LiH. HF. He0 and NJ&. The calculatious have been carried out iueludiuR: (a) particleparticle pIus hole-hole @p f hh) terms; (b) parti:Ie-hoie plus hole-partici
A series of SCF and CI calculations for the electronic ground state of H,O have been carried out with two different 14-function basis sets; one a Clementi-type double zeta ST0 l%sis and the other a contracted GTO set. The results obtained with the two bases are compared and analyzed in terms of inne