Asked in PMC Practice Test 12 (2021) 2021Moderate

The reaction of vinyl acetylene with HCI produces?

Correct answer: D. Chloroprene

  • A. Polyvinyl polymer
  • B. Polyvinyl Acetylene
  • C. Neoprene
  • D. Chloroprene

Explanation

The reaction of vinyl acetylene with HCl produces chloroprene. Chloroprene is a synthetic rubber that is used in a variety of applications, including tires, hoses, and gaskets. It is a colorless, liquid polymer with a strong odor. The reaction of vinyl acetylene with HCl is an electrophilic addition reaction. In an electrophilic addition reaction, an electron-rich molecule adds to an electron-deficient molecule. In the case of the reaction of vinyl acetylene with HCl, the electron-deficient molecule is the triple bond in vinyl acetylene. The HCl molecule donates its hydrogen atom to the triple bond, forming a carbocation. The chlorine atom then adds to the carbocation, forming chloroprene. The balanced equation for the reaction of vinyl acetylene with HCl is: CH2=C=CH + HCl → CH2=C(Cl)CH2 The reaction of vinyl acetylene with HCl can be catalyzed by a variety of substances, including copper chloride and ammonia. The reaction is typically carried out at room temperature or slightly above. Chloroprene is a versatile material with a variety of properties. It is strong, flexible, and resistant to chemicals and weather. It is also relatively inexpensive to produce. These properties make chloroprene a popular choice for a variety of applications.

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About Alkynes

Alkynes are unsaturated hydrocarbons containing a carbon-carbon triple bond, with sp-hybridised carbon atoms and a linear arrangement around the bond. The content includes nomenclature, preparation, acidity of terminal alkynes, and addition reactions with hydrogen, halogens, hydrogen halides and water, as well as oxidation.

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