Question 7 of 32beginner🔧 ApplyShort Answer2 marks

Calculate number of sigma (σ) and pi (π) bonds in the above structures (i-iv).

Correct Answer

(i) σ\sigma bonds: 33, π\pi bonds: 2

(ii) σ\sigma bonds: 17, π\pi bonds: 4

(iii) σ\sigma bonds: 23, π\pi bond: 1

(iv) σ\sigma bonds: 41, π\pi bond: 1

Exercise: Problem 9.8 | Q: 9.8 | (Page Page 13)
For More Understanding

Explanation

The question requires calculating the number of sigma and pi bonds for the four structures provided in Problem 9.7. By analyzing the structures of (i) 2,8-Dimethyl-3,6-decadiene, (ii) 1,3,5,7 Octatetraene, (iii) 2-nn-Propylpent-1-ene, and (iv) 4-Ethyl-2,6-dimethyl-dec-4-ene, we count all single bonds as sigma bonds and each double bond contains one sigma and one pi bond.

Solution Steps

  1. Structure (i): 2,8-Dimethyl-3,6-decadiene has σ\sigma bonds: 33 and π\pi bonds: 2.

  2. Structure (ii): 1,3,5,7 Octatetraene has σ\sigma bonds: 17 and π\pi bonds: 4.

  3. Structure (iii): 2-nn-Propylpent-1-ene has σ\sigma bonds: 23 and π\pi bond: 1.

  4. Structure (iv): 4-Ethyl-2,6-dimethyl-dec-4-ene has σ\sigma bonds: 41 and π\pi bond: 1.

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