Chapter 21, Problem 21.98P

Interpretation Introduction

Interpretation:

From the given spectra, the structure of the molecule is to be determined.

Concept introduction:

The various spectroscopies are the primary method for determining the structure of compounds. If the molecule is not too large or complex, the determination should be very accurate. These are simply done and rapid. They can be combined to give overlapping information.

The number ${\text{H}}_{\text{2}}$ molecules need to be added to a structure in order to obtain the corresponding saturated, acyclic species is the Index of Hydrogen Deficiency (IHD). The number of bonds and rings shows by the IHD in the structure. The IR and NMR is used to interpret the molecule.

The IR spectroscopy theory apply the idea that the compound incline to absorb specific frequencies of light that are characteristic of the matching structure of the compound.

The structure of molecule is determined by the application of nuclear magnetic resonance in NMR spectroscopy (proton nuclear magnetic resonance) with respect to the proton in the compound.