## Abstract **Covalent, ionic, or something new?** A new interpretation of the topology of the electron density at the bond critical point is proposed to characterize covalent, ionic, and chargeβshift bonding from the density point of view (see figure). The topological properties of the density rep
A unified treatment of valence and bond order from density operators
β Scribed by Karl Jug
- Publisher
- John Wiley and Sons
- Year
- 1984
- Tongue
- English
- Weight
- 552 KB
- Volume
- 5
- Category
- Article
- ISSN
- 0192-8651
No coin nor oath required. For personal study only.
β¦ Synopsis
A generalization of the quantum chemical definition of valence of atoms in molecules is suggested. Valence is considered as expectation value of diatomic parts of density operators. It appears as a sum of contributions from occupied orbitals of all atomic pairs that contain the reference atom. This definition is applicable on self-consistent-field (SCF) and configuration interaction (CI) level in any atomic orbitals (AO) basis. Its usefulness is demonstrated in an application to special molecules. Photoelectron spectroscopy and reactivity is discussed in this context.
π SIMILAR VOLUMES
This paper presents convolution-based estimates of a probability density and its derivatives. The proposed estimates can handle either contaminated data or not and they comprehend some classical estimates such that kernel, regularization estimates. By putting these direct and indirect estimation pro
Recent improved definitions of bond order and valencies are reviewed. Extensive tests of the determination of these properties from ab initio wavefunctions are reported, using prototypical molecules, such as methyl radical, ethylene, acetylene, water and hydrogen fluoride. The extension of these def