Page 81 - Practical-organic-3

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Functional group Frequency (cm ) Band intensity

1300-1370
(Symmetric stretch)

3000-3100 W (sh)

▪ Aromatic compound 1660-2000 W (sh)

1450-1600 M (sh)

Factors affecting the C=O stretching vibrations:

1. Electronic effect such as inductive effect may cause shift in absorption bands due to change
in absorption frequency.

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