Chapter 9 outline

Chapter 9 outline - iii. 4 shared electron pairs iv. 4...

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Chapter 9 outline VSEPR model Expanded valence shells Lone pairs and molecular geometry Polarity Hybrid orbitals Orbital shape and overlap Sp, sp2, sp3, sp3d, sp3d2 hybridization Sigma and pi bonding NO SECTION 9.7 Chapter 8: how to use VE to draw lewis dot structures Chapter 9: how to determine molecular shape using lewis dot structures Geometry plays a role in: Structural integrity of materials Polarity/attraction of molecules Physical state (g, l, s) Absorption of light Biochemistry reactions and drug behavior (ex. Thalidomide) 1. The Valence Shell Electron Pair Repulsion (VSEPR) model a. CH4 i. Valence electrons wants: 16 ii. Valence electrons has: 8
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Unformatted text preview: iii. 4 shared electron pairs iv. 4 covalent bonds as a result of shared valence electron pairs v. Central C is surrounded by 4 areas of (-) charge vi. Each electron will repel each other, try to get as far away from each other as possible vii. Tetrahedral geometry, bond angles=109.5 viii. To illustrate 3D shapes on a 2D piece of paper, we use dashes and wedges b. Linear bond angles: 180 c. Trigonal planar bond angles: 120 Areas of electron density example Name of electron domain geometry Bond angles 2 O=C=O Linear 180 3 BH3 Trigonal planar 120 4 CH4 tetrahedral 109.5...
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This note was uploaded on 04/03/2008 for the course CHM 113 taught by Professor Anbar during the Spring '06 term at ASU.

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Chapter 9 outline - iii. 4 shared electron pairs iv. 4...

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