Chapter 3, Problem 9E

Interpretation Introduction

Interpretation: The number of sigma and pi bonds in each molecule in the below structures should be reported.

  

Concept introduction: Bonds formed due to head-to-head overlap are termed sigma bond while ones formed by sideways or lateral overlap are named pi-bonds.

The 2 types of overlapping are as follows:

1. Head-on overlapping (sigma bond)

  

2. Sideway overlapping (pi bond)

  

A single bond has one $\text{σ}$ bond, double bond has one $\text{σ}$ bond along with one $\text{π}$ bond while triple bond has two $\text{π}$ bonds in addition to one $\text{σ}$ bond.