Abstract
Chromogenic tetradentate 5,7-dichloro-8-hydroxy-2-quinolylhydrazones of 5-methylfurfural, 2-thiophenecarboxaldehyde, and phenylglyoxylic acid have been prepared. Mass spectrometry data of the prepared hydrazones are presented. Spectral properties of the prepared products and their chromogenic reactions with selected heavy metal ions have been studied. High selectivity of the hydrazone of 5-methylfurfural with respect to lead ion has been demonstrated.
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