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Spectroscopic Tables

APPENDICES

SPECTROSCOPIC TABLES

The following pages contain some basic spectroscopic data tables.

(1) Schematic diagrams of NMR chemical shift data for H

Both the schematic figure and the table show similar information presented in different ways. Both have their merits.

They show the typical chemical shifts for protons being influenced by a single group.

In cases where a proton is

influenced by more than one group, the effects are essentially cumulative, for example proton shift in CH

Cl is at

approximately 3.1ppm while CH

= 5.3ppm.

(2) Schematic diagrams of NMR chemical shift data for

Like the proton NMR diagrams, the figure and the table show similar information presented in different ways and both

have their merits. They show the typical chemical shifts for carbon atoms being influenced by a single group. The effects

of multiple groups is a little more complex and is therefore less predictable than seen in H-NMR, but often the effects are

cumulative.

(3) Infra Red absorption frequencies

Typical ranges of absorption frequencies are provided. In individual cases, the specific frequency observed is affected by

a variety of factors including the particular structure of the sample molecule and the nature of the sample preparation (e.g.

nujol mull vs thin film vs solid disc).

Spectroscopic Tables