chapter_09_part1 - Molecular Shapes The shape of a molecule...

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Molecular Geometries and Bonding Molecular Shapes The shape of a molecule plays an important role in its reactivity. By noting the number of bonding and nonbonding electron pairs we can easily predict the shape of the molecule. 9.1 p347
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Molecular Geometries and Bonding What Determines the Shape of a Molecule? Simply put, electron pairs, whether they be bonding or nonbonding, repel each other. By assuming the electron pairs are placed as far as possible from each other, we can predict the shape of the molecule. 9.1 p348
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Molecular Geometries and Bonding Electron Domains We can refer to the electron pairs as electron domains . In a double or triple bond, all electrons shared between those two atoms are on the same side of the central atom; therefore, they count as one electron domain. This molecule has four electron domains. 9.2 p348
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Molecular Geometries and Bonding Valence Shell Electron Pair Repulsion Theory (VSEPR) “The best arrangement of a given number of electron domains is the one that minimizes the repulsions among them.” Figure 9.1 p346
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Molecular Geometries and Bonding Electron-Domain Geometries These are the electron-domain geometries for two through six electron domains around a central atom.
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