Abstract
AbstractNotwithstanding its tendency toward air oxidation in solution, 2‐hydrazinobenzothiazole I reacted with aromatic aldehydes in ethanol to give the corresponding hydrazones III‐XV in high yields and analytical purity. In related examples, acylation took place under similar conditions to produce hydrazides XVI‐XX. The near‐infrared bands of the absorption spectra of the araldehyde hydrazones have been associated with charge transfer and appeared to correlate with structural elements of the compounds in a way suggesting that the charge transfer was intermolecular.
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