chapter 9

chapter 9 - Chapter 9 Chapter Section 9.1 1 Lewis...

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Chapter 9 Chapter 9 Section 9.1 1
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Lewis structures assign molecular geometries but say nothing about the orbitals occupied by the bonding and lone pair electrons 2
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VALENCE BOND MODEL VALENCE BOND MODEL VALENCE BOND MODEL VALENCE BOND MODEL Covalent bond : overlap of orbitals on each of the two bonded atoms 3
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Draw the Lewis structure for hydrogen fluoride. What is the shape of a hydrogen fluoride molecule? 4
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• How about BeF 2 , BF 3 , CH 4 , PCl 5 , XeF 4 ? 5
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BeF 2 promotion hybridization two unhybridized p orbitals two sp hybrid orbitals 6
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F F Overlap of sp orbital from Be with p orbital from F along the nuclear axis: sigma bond 7
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Linear electron cloud geometry: sp hybridized orbitals One s orbital + one p orbital = two sp orbitals 180 o Two unhybridized p orbitals 8
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BF 3 promotion hybridization one unhybridized p orbitals three sp 2 hybrid orbitals 9
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F F How many sigma bonds? 10
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chapter 9 - Chapter 9 Chapter Section 9.1 1 Lewis...

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