Lecture 10 - 2 Requires application of molecular orbital...

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1 Reading for Wednesday ± Chapter 18: 18.1-18.4 Mon. 6:00-7:30 pm MAL 3092 Tues. 2:30-4:00 PM MAL 2007 Wed. 5:00-6:30 PM MAL 2001 Thurs. 9:30-10:50 AM MAL 1003 Sat. 11:00 AM-1:00 PM MAL 2007 PLUS Sessions THIS WEEK First Exam Thursday! February 17 th 6-7:30 PM 120 Budig *Exam Review Session* Tues. Feb. 15 6-7:30 pm (1001 MAL ) Chapter 17 Benzene and Aromatic Compounds Key examples with 6 π electrons: pyridine, pyrrole, imidazole, furan Recall the effect of conjugation on hybridization in X=Y-Z: systems!! Aromatic heterocycles (17.8C) Key examples with 6 π electrons: Cyclopentadienyl anion Cycloheptatrienyl cation (Tropylium ion) Aromatic ions (17.8D)
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Unformatted text preview: 2 Requires application of molecular orbital (MO) theory (to date we have been employing valence bond theory) Hckel simplified MO theory by ignoring bonds and looking only at bonds. Basis of Huckels Rule (17.9) A set of n atomic orbitals forms n molecular orbitals When two p orbitals having the same phase overlap, a bonding MO results When two p orbitals having opposite phases overlap, a * anti-bonding MO results MO Theory basics (17.9) Ethylene MOs Fig. 17.8 Benzene MOs Fig. 17.9 The -MOs of Benzene* *Courtesy of Dr. Gerald Lushington LUMOs HOMOs...
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This note was uploaded on 10/24/2011 for the course CHEMISTRY 623 taught by Professor Benson during the Spring '11 term at Kansas.

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Lecture 10 - 2 Requires application of molecular orbital...

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