Infrared Absorption Spectra of Hydrazides. III. Hydrazides of Aliphatic Acids

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The infrared absorption spectra of the hydrazides of aliphatic acids have been examined in the rock salt region. The N-H stretching frequencies are found near 3200 and 3030 cm−1 in the solid state and near 3320 cm−1 in dilute solution. The amide I band is seen near 1600 cm−1 in the solid state, while in solution there are two bands, near 1720 and 1690 cm−1. In the solid state the amide II band appears near 1490 cm−1. The amide III band is found near the lower limit of the normal range of 1305∼1200 cm−1 for the secondary amides.
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