Chapter 14, Problem 57DSP

Interpretation Introduction

Interpretation:

The major isomer of glucose is to be determined.

Concept introduction:

The magnitude of coupling constant depends on the dihedral angle.

The coupling constant is the greatest when the dihedral angle is $\text{0}°\text{ or 180}°$ and smallest when the dihedral angle is $\text{90}°$.

The coupling constant of protons which are diequatorial is between $\text{2-3Hz}$.

The coupling constant of protons which are axial/equatorial is between $\text{2-3Hz}$.

The coupling constant of protons which are di axial is between $\text{8-10Hz}$.

The more intense peak of a particular fragment in the spectrum suggests the greater proportion of that fragment in the structure.