Chapter 3, Problem 13CTQ

Interpretation Introduction

Interpretation: The Lewis structure of ethene should be drawn and also the sigma and pi bonds in below figure and Lewis structure of ethene should be labeled.

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.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. Ethyne is one such molecule to understand this overlap that results in pi bond formation. It has terminal and central sigma bonds and two pi bonds each in different planes as shown by two sets of orthogonal p-orbital.