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Presentation17_061113

Presentation17_061113 - Chem 6A Presentation#17 Overview...

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Chem 6A Presentation #17 2006-11-13 1 Overview Chapter 3: Chemical Bonds Molecular orbital (MO) theory Heteronuclear molecules Band theory Fundamentals L: Reaction stoichiometry Making predictions based on a chemical equation Volumetric analysis and titrations
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2 Molecular orbital (MO) theory: Homonuclear diatomic molecules Combining 2 s and 2 p AOs
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3 Molecular orbital (MO) theory: Heteronuclear diatomic molecules NO: Bond order of 2 is closer to that measured by experiment than that suggested by the resonance Lewis structures.
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4 Molecular orbital (MO) theory: Heteronuclear diatomic molecules HF:
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5 Molecular orbital (MO) theory: Heteronuclear diatomic molecules CO:
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6 Molecular orbital (MO) theory: Heteronuclear diatomic molecules ICl:
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7 Molecular orbital (MO) theory: Polyatomic molecules MO theory explains resonance by positing that some MOs extend over several atoms; electrons in these MOs are delocalized . Example: ozone:
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8 Molecular orbital (MO) theory: Polyatomic molecules Example: π orbitals of benzene
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9 Molecular orbital (MO) theory: Band theory Band theory extends MO theory to solids (metals, semiconductors)
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