Keywords
azo compounds
azo–hydrazone tautomerism.
benzoquinones
dioxolene ligands
hydrazones
p-iminoquinone
photoresponsive ligands
Abstract
Reaction of 3-hydroxy-2,5-di-tert-butyl-1,4-benzoquinone with phenylhydrazine hydrochloride mainly leads to the corresponding hydrazone at the position 1 existing in tautomeric equilibrium with 3,6-di-tert-butyl-4-(phenyl- diazenyl)catechol. Thermodynamic parameters of the tautomerization were evaluated by NMR spectroscopy. The hydrazone structure was confirmed by XRD study.
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