oct 13 - Wed, 13 Oct 10 Announcements Lecture 6...

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1 Wed, 13 Oct 10 • Announcements • Lecture 6 – Hybridization and the Localized Electron Model (14.1 through pg. 667 only ) Consider Methane… Using VSEPR, we determined that CH 4 should have a tetrahedral shape based on the repulsions of four electron pairs. We expect that all four C-H bonds in methane will be identical. But recall the atomic orbitals on carbon…
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2 4 effective e pairs: sp 3 hybridization sp 3 Orbitals in Methane Tetrahedral arrangement of sp 3 orbitals Probability density of an sp 3 orbital VSEPR structure
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sp 3 Orbitals in Ammonia In NH 3 , three of the sp 3 orbitals form bonds with H atoms. The fourth hosts the lone pair on the N atom. H N H H VSEPR structure VSEPR structures AO hybridization schemes have been developed for all the VSEPR structures we’ve seen. As expected, the larger the atom, the less accurate the hybrid AO scheme. But it works very well for Period 2 (esp. C), so it widely used in organic chemistry.
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This note was uploaded on 10/26/2010 for the course CHEM 152 taught by Professor Chiu during the Fall '08 term at University of Washington.

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oct 13 - Wed, 13 Oct 10 Announcements Lecture 6...

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