OChem Lecture 8 1 Chapter 15 benzene and aromaticity I Naming and drawing benzenes 15 1 1 Drawing 2 Naming A Monosubstituted pre x benzene B Disubstituted Ortho 1 2 relationship Meta 1 3 relationship Para 1 4 relationship C Tri and poly substituted D Common names toluene styrene phenol aniline II Aromaticity 1 De ne 15 6 A Huckel s Rule electon count of a cyclic conjugated system must t the formula 4n 2 n 0 1 2 B 4n are antiaromatic unstable C Systems that do not apply are called nonaromatic D Charged molecules
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