Vinyl acetylene combines with hydrochloric acid produces___________________?
Correct answer: C. Chloroprene
- A. Diviny1 acetylene
- B. Ethylidine dichloride
- C. Chloroprene
- D. 1 - 3 - 3 - trichloro butane
Explanation
Addition of one molecule of HCl to vinyl acetylene, CH2=CH-C≡CH, gives 2-chloro-1,3-butadiene, commonly called chloroprene. This product is formed by addition across the triple bond while retaining the conjugated diene system. The likely wrong choice is ethylidene dichloride, which would require addition of two HCl molecules rather than one.
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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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IUPAC name of Divinyl acetylene is: