## Abstract The basisβset convergence of singlet and triplet pair energies of coupledβcluster theory including single and double excitations is accelerated by means of extrapolations based on the distinct convergence behaviors of these pairs. The new extrapolation procedure predicts a nonrelativist
The inversion barrier in NH3
β Scribed by G. Campoy; A. Palma; L. Sandoval
- Publisher
- John Wiley and Sons
- Year
- 2009
- Tongue
- English
- Weight
- 290 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0020-7608
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The tnverslon barner of AsF3 has been calculated usmg SCF theory wth a moderately large basu set of Slater type orbltals, mcIudmg poIarlzation functions on the central atom. The caIcu!ated barner is = 1 I2 kcal/mole. The highest occupied molecular orbnal m planar AsF3 IS shown to have A; symmetry, r
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The barrier to inversion in NF$ has been studied using ab initio molecular-orbital theory including geometry optimization at the correlation energy level. The barrier is predicted to be 12.6 kcal mol-'. Comparison is made to previous theoretical and experimental results.