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Vsepr_Theory

2013-11-13 来源: 类别: 更多范文

Vsepr Theory Valence Shell Electron Pair Repulsion Theory VSEPR Theory is one method that chemists use to predict the shapes of molecules. This theory predicts that electron pairs, whether involved in bonds or as non-bonding pairs, will adopt a geometry in which they maximize the distance from one another in order to minimize repulsions. This will result in a geometry with the lowest possible energy. Valence Shell Electron Pair Repulsion theory (VSEPR) is a set of rules whereby the chemist may predict the shape of an isolated molecule. It is based on the premise that groups of electrons surrounding a central atom repel each other, and that to minimize the overall energy of the molecule, these groups of electrons try to get as far apart as possible. Groups of electrons can refer to electrons that participate in a bond (single, double, or triple) to another atom, or to non-bonding electrons (e.g. lone pair electrons). The ideal electronic symmetry of a molecule consisting of a central atom surrounded by a number of substituents (bonded atoms and non-bonding electrons) is characteristic of the total number of substituents, and is determined solely by geometric considerations -- the substituents are arranged so as to maximize the two, geometry, electrons, orbitals, , molecule, one, domains, bond, each, electron, three, figure, bonds, pairs, atom, central, 2s, vsepr, valence, trigonal, 2p, structure, sp2, four, domain, carbon, between, around, six, orbital, lewis, since, shape, hybrid, gives
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