In this work the classical valence-bond VB theory of the 1930s is recast ลฝ . in a fully ab initio modern form. The basic premises are simply i that valency is associated with singly occupied orbitals on the constituent atoms of a molecule, more ลฝ . tightly bound electrons being assigned to a ''core,
New problems for ab-initio valence bond theory
โ Scribed by Massimo Simonetta; Mario Raimondi; Gian Franco Tantardini
- Publisher
- John Wiley and Sons
- Year
- 2009
- Tongue
- English
- Weight
- 251 KB
- Volume
- 20
- Category
- Article
- ISSN
- 0020-7608
No coin nor oath required. For personal study only.
๐ SIMILAR VOLUMES
## Abstract An __ab initio__ valence bond (VB) method for calculating energies and wave functions for simple electronic systems is described and the results of its application to methylene are given together with extensive comparisons with previous theoretical results.
## Abstract Starting from the 1980s and onwards, Valence Bond theory has been enjoying renaissance that is characterized by the development of a growing number of __ab initio__ methods, and by many applications to chemical reactivity and to the central paradigms of chemistry. Owing the increase of
An opcr-ltor oi\_&n~ic ci~rge is introduced. the expectation values of which are blullikn's gross atomic populations on rhc indh idu.d atom\ Suitable definitions of the bond order (multiplicit)') inde\ zmd of the vslence number of an atom in 3 moksule XC .&o proposed for ths SCF LCAO MO method. (The