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16 Δεκ 2021 · The Valence-Shell Electron-Pair Repulsion (VSEPR) theory helps us to understand and predict the geometry (shape) of molecules or ions. The theory is: Electron pairs repel each other whether they are in chemical bonds or lone pairs.
- 1.5: Structure and Bonding
The formal definition that is the basis for VSEPR is as...
- 1.5: Structure and Bonding
Valence shell electron pair repulsion (VSEPR) theory (/ ˈ v ɛ s p ər, v ə ˈ s ɛ p ər / VESP-ər, [1]: 410 və-SEP-ər [2]) is a model used in chemistry to predict the geometry of individual molecules from the number of electron pairs surrounding their central atoms. [3]
The formal definition that is the basis for VSEPR is as follows: Pairs of electrons in the valence shell of a central atom of a molecule repel each other and take up positions as far apart as possible.
The VSEPR theory assumes that each atom in a molecule will achieve a geometry that minimizes the repulsion between electrons in the valence shell of that atom. The five compounds shown in the figure below can be used to demonstrate how the VSEPR theory can be applied to simple molecules.
The valence-shell electron-pair repulsion (VSEPR) model allows us to predict which of the possible structures is actually observed in most cases. It is based on the assumption that pairs of electrons occupy space, and the lowest-energy structure is the one that minimizes electron pair–electron pair repulsions.
3 Ιουλ 2019 · Valence Shell Electron Pair Repulsion Theory is a molecular model to predict the geometry of the atoms making up a molecule where the electrostatic forces between a molecule's valence electrons are minimized around a central atom.
The valence shell electron pair repulsion model is often abbreviated as VSEPR (pronounced "vesper") and is a model to predict the geometry of molecules. Specifically, VSEPR models look at the bonding and molecular geometry of organic molecules and polyatomic ions. It is useful for nearly all compounds that have a central atom that is not a metal.
