The number of sigma (σ) and pi (π) bonds in pent-2-en-4-yne is:

31 2019 Organic Chemistry - Some Basic Principles and TechniquesCovalent Bond – Sigma and Pi Bonds in Organic Molecules Medium
The number of sigma ($\sigma$) and pi ($\pi$) bonds in pent-2-en-4-yne is:
A $10\ \sigma$ bonds and $3\pi$ bonds
B $8\ \sigma$ bonds and $5\pi$ bonds
C $11\ \sigma$ bonds and $2\pi$ bonds
D $13\ \sigma$ bonds and no $\pi$ bond

Detailed Solution

Structure of pent-2-en-4-yne: $CH_3-CH=CH-C\equiv CH$ Counting bonds: C–H σ bonds = 3 + 1 + 1 + 1 = 6; C–C σ bonds = 4 Number of σ bonds = 10 π bonds: 1 in C=C and 2 in C≡C, so number of π bonds = 3

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