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Full set of Notes with Fill-Ins - San Jose State University

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Chem 155 Unit 11 201 <strong>of</strong> 316Aromatic UV-Visible absorptions:• Three <strong>set</strong>s <strong>of</strong> ππ* bands are prominent in thespectrum <strong>of</strong> benzene:Primary E2 Bλ (nm) 184 204 256ε MAX (M -1 cm -1 ) 60,000 7,900 200V. Strong Strong Intermed• -OH and –NH 2 red-shift and intensify the B-bandDoes the nonbonding pair stabilize or destabilize theπ orbitals? (assuming it acts predominantly on π asopposed to π*)Page 201 <strong>of</strong> 316

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