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Core - Organic Chemistry

    Chapter 17

    Aromatic Compounds

    17.1 : Aromatic Compounds: Overview01:25

    17.1 : Aromatic Compounds: Overview

    In general, the term ‘aromatic’ indicates a pleasant smell or fragrance from fresh flowers, freshly prepared coffee, etc. In the early history ...

    10.4K views
    17.2 : Nomenclature of Aromatic Compounds with a Single Substituent01:23

    17.2 : Nomenclature of Aromatic Compounds with a Single Substituent

    Benzene is the simplest aromatic hydrocarbon or arene. The IUPAC names for simple monosubstituted benzene derivatives are derived by adding the ...

    8.0K views
    17.3 : Nomenclature of Aromatic Compounds with Multiple Substituents01:11

    17.3 : Nomenclature of Aromatic Compounds with Multiple Substituents

    When more than one substituent is present on the benzene ring, the IUPAC nomenclature depends on the number of substituents present. For disubstituted ...

    7.6K views
    17.4 : Structure of Benzene: Kekulé Model01:07

    17.4 : Structure of Benzene: Kekulé Model

    In 1865, August Kekule suggested the structure of benzene according to the structural theory of organic chemistry based on the three ...

    8.6K views
    17.5 : Structure of Benzene: Molecular Orbital Model01:18

    17.5 : Structure of Benzene: Molecular Orbital Model

    According to the molecular orbital (MO) model, benzene has a planar structure with a regular hexagon of six sp2 hybridized carbons. As shown in Figure 1, ...

    8.9K views
    17.6 : Criteria for Aromaticity and the H&uuml;ckel 4<em>n</em> + 2 Rule01:20

    17.6 : Criteria for Aromaticity and the Hückel 4n + 2 Rule

    Like benzene, cyclobutadiene and cyclooctatetraene are cyclic compounds with alternate single and double bonds. However, their chemical behavior differs ...

    10.3K views
    17.7 : Hückel's Rule Diagram of π MOs: Frost Circle01:08

    17.7 : Hückel's Rule Diagram of π MOs: Frost Circle

    The Frost circle or the inscribed polygon method is a graphical method for determining the relative energies of π molecular orbitals (MOs) for ...

    4.3K views
    17.8 : Frost Circles for Different Conjugated Systems01:18

    17.8 : Frost Circles for Different Conjugated Systems

    The inscribed polygon method is consistent with Hückel’s 4n + 2 rule and helps to learn whether the given cyclic compound is aromatic or not. ...

    2.7K views
    17.9 : Aromatic Hydrocarbon Anions: Structural Overview01:18

    17.9 : Aromatic Hydrocarbon Anions: Structural Overview

    Neutral hydrocarbons like cyclopentadiene with an odd number of carbon atoms and one intervening CH2 group in the ring are not aromatic. Cyclopentadiene ...

    2.7K views
    17.10 : Aromatic Hydrocarbon Cations: Structural Overview01:18

    17.10 : Aromatic Hydrocarbon Cations: Structural Overview

    Cycloheptatriene is a neutral monocyclic unsaturated hydrocarbon that consists of an odd number of carbon atoms and an intervening sp3 carbon in the ring. ...

    2.8K views
    17.11 : Five-Membered Heterocyclic Aromatic Compounds: Overview01:13

    17.11 : Five-Membered Heterocyclic Aromatic Compounds: Overview

    Heterocyclic aromatic compounds are cyclic compounds that are aromatic and have one or more heteroatoms—atoms other than carbon, in the ring. ...

    3.8K views
    17.12 : NMR Spectroscopy of Aromatic Compounds01:14

    17.12 : NMR Spectroscopy of Aromatic Compounds

    Aromatic compounds can be identified or analyzed using proton NMR and carbon‐13 NMR. Typically, aromatic hydrogens or hydrogens directly bonded to ...

    4.5K views
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