CHEM152L(7_7_09)

CHEM152L(7_7_09) - boiling points than meta or ortho...

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CHEM 152L Summer 2009 7/7/09 Define term aromatic – unusual stability due to the delocalization of the electrons around the conjugated pi system (conditions for aromaticity – and 4n + 2 rule) Examples of aromatic compounds – and finally antiaromatic MO Discussion of aromatic and antiaromatic – 4n + 2 rule and 4n rule……planar, and ultimately how MO theory helps to discuss aromaticity. Benzene and its derivatives – some common aromatics
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CHEM 152L Summer 2009 NH 2 OCH 3 OH phenyl versus aryl group – Physical properties of benzene derivatives – meta, ortho and para substituted derivatives, as we look at boiling points we see that para substituted species tend to have higher
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Unformatted text preview: boiling points than meta or ortho substituted. Spectroscopy of benzene derivatives EX. CHEM 152L Summer 2009 Electrophilic Aromatic Substitution reactions of benzene General reaction of Electrophilic Aromatic Substitution (EAS) X-Y Lewis acid X + HY all EAS reactions go through a similar mechanism. So ultimately, we will do a survey of these reactions and explain the pathway that they take. Halogenation Sulfonation Nitration Friedel Crafts alkylation and acylation CHEM 152L Summer 2009 Directing effects of substituents on Benzene Activating/deactivating Ortho/para meta directing...
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CHEM152L(7_7_09) - boiling points than meta or ortho...

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