Determine the possible number of alkynes with molecular formula C₅H₈.

Question

Quizplus · Accepted Answer

The molecular formula indicates that there are 10 carbon atoms (C1U1B15S1U1 + 1C1U1B0H + 1C1U1B18S1U1), which means that there can potentially be 5 triple bonds (each alkyne contains 2 carbon atoms connected by a triple bond). However, we need to consider the possible isomers:
-If all 5 triple bonds are in a straight chain, there is only one possible alkyne: HC≡C-CH2-C≡C-CH2-C≡C-CH2-C≡C-CH3
-If there are two branched chains with one triple bond each, there are two possible isomers:
  1. HC≡C-CH2-C≡C-CH(CH3)-C≡C-CH3
  2. HC≡C-CH2-C(CH3)≡C-CH2-C≡C-CH3
-If there are three branched chains with one triple bond each, there are two possible isomers:
  1. HC≡C-CH(CH3)-C≡C-CH2-C≡C-CH2-CH3
  2. HC≡C-CH2-C≡C-CH2-C(CH3)≡C-CH3
Therefore, there are a total of 3 possible alkynes.

Determine the Possible Number of Alkynes with Molecular Formula C5H8

Determine the Possible Number of Alkynes with Molecular Formula C₅H₈