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Core - Organic Chemistry

    Chapter 9

    Alkynes

    9.1 : Structure and Physical Properties of Alkynes02:37

    9.1 : Structure and Physical Properties of Alkynes

    Introduction: In nature, compounds containing both carbon and hydrogen are known as "hydrocarbons". Aliphatic hydrocarbons are compounds whose ...

    10.3K views
    9.2 : Nomenclature of Alkynes02:39

    9.2 : Nomenclature of Alkynes

    Alkynes are unsaturated hydrocarbons characterized by the presence of carbon-carbon triple bonds and have a general formula CnH2n-2. The nomenclature of ...

    17.9K views
    9.3 : Acidity of 1-Alkynes02:42

    9.3 : Acidity of 1-Alkynes

    The acidic strength of hydrocarbons follows the order: Alkynes > Alkenes > Alkanes. The strength of an acid is commonly expressed in units of pKa ...

    9.6K views
    9.4 : Preparation of Alkynes: Alkylation Reaction02:27

    9.4 : Preparation of Alkynes: Alkylation Reaction

    Introduction Alkylation of terminal alkynes with primary alkyl halides in the presence of a strong base like sodium amide is one of the common methods for ...

    9.9K views
    9.5 : Preparation of Alkynes: Dehydrohalogenation02:34

    9.5 : Preparation of Alkynes: Dehydrohalogenation

    Introduction Alkynes can be prepared by dehydrohalogenation of vicinal or geminal dihalides in the presence of a strong base like sodium amide in liquid ...

    15.6K views
    9.6 : Electrophilic Addition to Alkynes: Halogenation02:38

    9.6 : Electrophilic Addition to Alkynes: Halogenation

    Introduction Halogenation is another class of electrophilic addition reactions where a halogen molecule gets added across a π bond. In alkynes, the ...

    8.1K views
    9.7 : Electrophilic Addition to Alkynes: Hydrohalogenation02:35

    9.7 : Electrophilic Addition to Alkynes: Hydrohalogenation

    Electrophilic addition of hydrogen halides, HX (X = Cl, Br or I) to alkenes forms alkyl halides as per Markovnikov's rule, where the hydrogen gets ...

    9.8K views
    9.8 : Alkynes to Aldehydes and Ketones: Acid-Catalyzed Hydration02:40

    9.8 : Alkynes to Aldehydes and Ketones: Acid-Catalyzed Hydration

    Introduction Analogous to alkenes, alkynes also undergo acid-catalyzed hydration. While the addition of water to an alkene gives an alcohol, hydration of ...

    8.2K views
    9.9 : Alkynes to Aldehydes and Ketones: Hydroboration-Oxidation02:47

    9.9 : Alkynes to Aldehydes and Ketones: Hydroboration-Oxidation

    Introduction One of the convenient methods for the preparation of aldehydes and ketones is via hydration of alkynes. Hydroboration-oxidation of alkynes is ...

    17.8K views
    9.10 : Alkynes to Carboxylic Acids: Oxidative Cleavage02:01

    9.10 : Alkynes to Carboxylic Acids: Oxidative Cleavage

    Alkynes undergo oxidative cleavage in the presence of oxidizing reagents like potassium permanganate and ozone. The triple bond — one σ bond ...

    4.9K views
    9.11 : Reduction of Alkynes to <em>cis</em>-Alkenes: Catalytic Hydrogenation02:24

    9.11 : Reduction of Alkynes to cis-Alkenes: Catalytic Hydrogenation

    Introduction Like alkenes, alkynes can be reduced to alkanes in the presence of transition metal catalysts such as Pt, Pd, or Ni. The reaction involves ...

    7.6K views
    9.12 : Reduction of Alkynes to <em>trans</em>-Alkenes: Sodium in Liquid Ammonia02:10

    9.12 : Reduction of Alkynes to trans-Alkenes: Sodium in Liquid Ammonia

    Alkynes can be reduced to trans-alkenes using sodium or lithium in liquid ammonia. The reaction, known as dissolving metal reduction, proceeds with an ...

    9.1K views
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