Aromatic Compounds and Aromaticity

Aromatic Compounds and Aromaticity -- Section 14 of Organic Chemistry Notes is 11 pages in length (page 14-1 through page 14-11) and covers ALL you'll need to know on the following lecture/book topics:

SECTION 14 – Aromatic Compounds and Aromaticity

14-1 -- Definition of Aromaticity
_· Cyclic, Planar, Fully Conjugated Array of p-Orbitals
_· Huckel’s Rule (“4n + 2”)
14-1 -- Benzene and its Derivatives
_· Very Unreactive
_· How Stable is Benzene?
_· Hydrogenation of Benzene (Addition of H2)
_· Benzene Stability Explained by “Model 1” and “Model 2”
_· Resonance Energy (or “Aromatic Stabilization Energy”)
_· Napthalene and Phenanthrene as Examples
14-3 -- Compounds with Planar, Conjugated, Cyclic Arrays of “4n” π-Electrons
_· Antiaromatic Compounds
_· Extremely Unstable; Very Reactive
14-4 -- Benzene Derivatives that are Neither Aromatic nor Antiaromatic
14-5 -- More Examples of Aromatic Compounds
_· “4n + 2”
_· Re-Hybridization of sp3-orbital --> sp2-orbital
14-7 -- More Examples of Antiaromatic Compounds
_· “4n”
14-7 -- Spectroscopy of Benzene
_· UV-Vis Spectroscopy of Benzene
_· IR Spectroscopy of Benzene
_· 1H NMR Spectroscopy of Benzene
_· Coupling – in 1H NMR
_· 1,4-Disubstituted vs. 1,2-Disubstituted vs. 1,3-Disubstituted Benzenes
14-9 -- Nomenclature of Substituted Benzenes
_· Monosubstituted Benzenes (Common Names are Used)
_· Disubstituted Benzenes – Ortho (o), Meta (m), and Para (p)
_· Use of Monosubstituted Benzenes as “Principal Structures” in Nomenclature
_· Xylenes = Dimethyl Substituted Benzenes

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Aromatic Compounds and Aromaticity

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