Kotz ch10 Lecture

Kotz ch10 Lecture - 1 10 – Bonding and Molecular...

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Unformatted text preview: 1 10 – Bonding and Molecular Structure: Orbital Hybridization and Molecular Orbitals Two ways of explaining bonding Two ways of explaining bonding Valence Bond Theory ( Valence Bond Theory ( Valence Bond Theory ( Valence Bond Theory (Linus Linus Linus Linus Pauling) Pauling) Pauling) Pauling) Bonding electron pairs between atoms and lone pairs of electrons localized on a particular atom. Bonds are formed by overlap of atomic orbitals is the basis for valence bond theory. Molecular Orbital Theory (MOT) (Robert S. Molecular Orbital Theory (MOT) (Robert S. Molecular Orbital Theory (MOT) (Robert S. Molecular Orbital Theory (MOT) (Robert S. Mulliken Mulliken Mulliken Mulliken) Molecular orbitals that are “spread out”, or delocalized over the molecule. Unhybridized bonding overlap Note that end-on overlaps are known as sigma bonds ( σ ). Hybridization of orbitals: Predicting and explaining bond angles Orbitals “hybridize” to form equivalent bonding orbitals. sp 2 hybrids 2 Orbital Energy in Hybridized Orbitals sp 3 hybrids Example: Use orbital box diagrams to show the hybridization of phosphorus in PCl 5 Multiple Bonds in Valence Bond Theory π bonds are unhybridized p-orbitals Triple Bonds Example: Use valence bond theory to describe the bonding in the hydronium ion, H 3 O + , and methylamine, CH 3 NH 2 . 3 Example Identify the hybridization of the central atom in the following compounds and ions:...
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Kotz ch10 Lecture - 1 10 – Bonding and Molecular...

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