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Chapter 9

炔烃

炔烃的结构和物理性质
炔烃的结构和物理性质
Introduction: In nature, compounds containing both carbon and hydrogen are known as "hydrocarbons". Aliphatic hydrocarbons are compounds whose ...
炔烃的命名法
炔烃的命名法
Alkynes are unsaturated hydrocarbons characterized by the presence of carbon-carbon triple bonds and have a general formula CnH2n-2. The nomenclature of ...
1-炔烃的酸度
1-炔烃的酸度
The acidic strength of hydrocarbons follows the order: Alkynes > Alkenes > Alkanes. The strength of an acid is commonly expressed in units of pKa ...
炔烃的制备:烷基化反应
炔烃的制备:烷基化反应
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 ...
炔烃的制备:脱卤化氢
炔烃的制备:脱卤化氢
Introduction Alkynes can be prepared by dehydrohalogenation of vicinal or geminal dihalides in the presence of a strong base like sodium amide in liquid ...
炔烃的亲电加成反应:卤化
炔烃的亲电加成反应:卤化
Introduction Halogenation is another class of electrophilic addition reactions where a halogen molecule gets added across a π bond. In alkynes, the ...
炔烃的亲电加成反应:卤化氢
炔烃的亲电加成反应:卤化氢
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 ...
炔烃制醛和酮:酸催化水合
炔烃制醛和酮:酸催化水合
Introduction Analogous to alkenes, alkynes also undergo acid-catalyzed hydration. While the addition of water to an alkene gives an alcohol, hydration of ...
炔烃制醛和酮:硼氢化-氧化
炔烃制醛和酮:硼氢化-氧化
Introduction One of the convenient methods for the preparation of aldehydes and ketones is via hydration of alkynes. Hydroboration-oxidation of alkynes is ...
炔烃制羧酸:氧化裂解
炔烃制羧酸:氧化裂解
Alkynes undergo oxidative cleavage in the presence of oxidizing reagents like potassium permanganate and ozone. The triple bond — one σ bond ...
炔烃还原为<em>顺</em>式烯烃:催化加氢
炔烃还原为式烯烃:催化加氢
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 ...
将炔烃还原为<em>反</em>式烯烃:液氨中的钠
将炔烃还原为式烯烃:液氨中的钠
Alkynes can be reduced to trans-alkenes using sodium or lithium in liquid ammonia. The reaction, known as dissolving metal reduction, proceeds with an ...
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