Evaluation of an IR spectrum

When evaluating an IR spectrum the first step is to attempt to identify the high intensity bands and band groups. To do this, the practical analyst makes use of a comprehensive collection of IR spectra which is arranged according to families, structural features and functional groups and is 

The prerequisite for structural elucidation is a chemically pure substance. 

If its molecular weight is known, this facilitates structural elucidation. The IR spectrum is to be read from left to right. 

Atomic oscillators with strong polar bonds provide high-intensity bands. Oscillators which are damped, e.g. by their interaction with hydrogen bridges, produce broad bands. 

If the band characteristic of a functional group is missing in the spectral 

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