Chapter 12, Problem 12.30SP

Interpretation Introduction

Interpretation: Each given structure with its characteristic absorption in the IR is to be matched.

Concept introduction: An IR spectrum is a graph for the energy absorbed by a molecule as a function of the frequency or wavelength of light. Alkanes, alkenes and alkynes have characteristic $\text{C}-\text{H}$ stretching frequencies. Isolated alkenes have value $1640-1680{\text{cm}}^{-1}$  and that of conjugated alkenes have $1620-1640{\text{cm}}^{-1}$ frequencies.

To determine: The each given structure with its characteristic absorption in the IR.