Chapter 13.9, Problem 13.14P

(a)

Interpretation Introduction

Interpretation:

The chemical shifts of ${\text{H}}_{\text{a}}$, ${\text{H}}_{\text{b}}$, and ${\text{H}}_{\text{c}}$ are to be stated.

Concept introduction:

The chemical shift is defined as the difference in parts per million in the absorption spectrum of a particular proton from the absorption position of a reference proton. Tetramethylsilane is taken as the reference proton. Chemical shifts are measured in parts per million and it is a dimensionless quantity.

(b)

Interpretation Introduction

Interpretation:

The coupling constants $J_{\text{ab}}\text{and}{J}_{\text{bc}}$ is to be estimated.

Concept introduction:

NMR spectroscopy is a technique used to determine the unique structure of the compounds. It identifies the carbon-hydrogen bonding of an organic compound. A hydrogen atom is called as a proton in the NMR spectroscopy.

(c)

Interpretation Introduction

Interpretation:

The diagram to analyze the complex splitting of the proton centered at $\delta 6.7$ is to be drawn.

Concept introduction:

NMR spectroscopy is a technique used to determine the unique structure of the compounds. It identifies the carbon-hydrogen bonding of an organic compound. A hydrogen atom is called as a proton in the NMR spectroscopy.