Hydrocarbons Ques 18

18. The IUPAC name of the compound having the formula $CH \equiv C-CH=CH_2$ is :

[2009]

(a) 1-butyne-3-ene

(b) but-1-yne-3-ene

(c) 1-butyne-3-ene

(d) 3-butyne-1-ene

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Solution:

  1. (c) So the IUPAC name of the compound is 1-butene-3-yne.

If both the double and triple bonds are present in the compound, it is regarded as derivative of alkyne. Further, if double and triple bonds are at equidistance from either side, the preference is given to triple bond.