𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Geometry optimization in ab initio molecular orbital theory

✍ Scribed by Dieter Poppinger


Publisher
Elsevier Science
Year
1975
Tongue
English
Weight
424 KB
Volume
34
Category
Article
ISSN
0009-2614

No coin nor oath required. For personal study only.

✦ Synopsis


A gradient optimization procedure has been used to calculate equilibrium geometries for several small molecules in the framework of ab initio molecular orbital theory. The gradient method was found to be faster and more reliable than two direcl search procedures.


πŸ“œ SIMILAR VOLUMES


Geometry optimization in AB initio calcu
✍ Hanspeter Huber πŸ“‚ Article πŸ“… 1979 πŸ› Elsevier Science 🌐 English βš– 420 KB

Geometry optimizations being still very time-consumin s, methods are imrstigated to sa%e time .tt least in spcci.d cases. The Hellmzutn-Fejnmzm force is reconsidered as 3x1 approximation to the energy gradrent .md is found useful for the first few iterations of a Fometry optimization for molecules h

On the ab initio geometry optimization o
✍ Rosanna Bonaccorsi; Roberto Cammi; Jacopo Tomasi πŸ“‚ Article πŸ“… 1991 πŸ› John Wiley and Sons 🌐 English βš– 917 KB

## Abstract We present several variants of methods for the automatic search of optimum geometries of solutes via __ab initio__ SCF procedures. The physical meaning of geometry optimization in solution is discussed. Advantages and disadvantages of the different variants are shown making use of calcu

The role of d-orbitals in predicting acc
✍ M.P.S. Collins; B.J. Duke πŸ“‚ Article πŸ“… 1976 πŸ› Elsevier Science 🌐 English βš– 321 KB

The crucial role of including d-orbital in predicting geometries of molecuies containing second row atoms in the usual ntom-centred LCAO MO ab initio method is critically discussed. Examples are taken from the lirerature and from calculations on H2S, MeSH and FSN\_employing a variety of basis sets.

Ab initio geometry optimization for larg
✍ Eckert, Frank; Pulay, Peter; Werner, Hans-Joachim πŸ“‚ Article πŸ“… 1997 πŸ› John Wiley and Sons 🌐 English βš– 175 KB πŸ‘ 1 views

Various geometry optimization techniques are systematically Ε½ . investigated. The rational function RF and direct inversion in the iterative Ε½ . subspace DIIS methods are compared and optimized for the purpose of geometry optimization. Various step restriction and line search procedures are tested.

Ab initio molecular orbital study of 1-f
✍ G. I. Csonka; P. Hencsei πŸ“‚ Article πŸ“… 1994 πŸ› John Wiley and Sons 🌐 English βš– 828 KB

## Abstract The molecular geometry of 1‐fluorosilatrane was optimized fully by restricted Hartree–Fock (HF) calculations using the 3‐21G, 3‐21G(__d__) and 6‐31G(__d__) basis sets, with the aim of locating the positions of the local minima on the energy hypersurface. The optimized geometries were co