chapter 10-6 slides per page

chapter 10-6 slides per page - Molecular Shapes Topics The...

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1 Topics • The VSEPR Model • Molecular Shape and Molecular Polarity • Valence Bond Theory Hybrid Orbitals Multiple Bonds • Molecular Orbital Theory Second Period Diatomic Molecules Molecular Shapes BF 3 PF 3 The VSEPR Model V alence S hell E lectron P air R epulsion model: • allows to predict shapes of molecules made of main groups elements. • considers two types of electron pairs on a central atom: - bonding electron pairs - lone electron pairs • assumes that, in order to minimize the electron repulsion, each pair of valence electrons on a central atom stays as far away from the others as possible Arrangement of Electron Pairs About an Atom How to Predict Molecular Geometry? ¾ Draw the Lewis structure ¾ Determine how many electrons pairs are around the central atom. Count a multiple bond as one pair. ¾ Arrange the electrons pairs as shown in Figure 10.2. ¾ Obtain the molecular geometry from the directions of bonding pairs as shown in Figures 10.4 and 10.8 Figure 10.3: Molecular geometries.
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2 H—A—H bond angles in some molecules.
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This note was uploaded on 05/04/2010 for the course CHEMISTRY 130 taught by Professor Jadwigasipowska during the Winter '10 term at University of Michigan.

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chapter 10-6 slides per page - Molecular Shapes Topics The...

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