Two azo pigments based on β-naphthol

MU Schmidt, J Brüning, D Wirth…

文献索引：Schmidt, Martin U.; Bruening, Juergen; Wirth, Daniela; Bolte, Michael Acta Crystallographica Section C: Crystal Structure Communications, 2008 , vol. 64, # 9 p. o474-o477

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被引用次数: 9

摘要

There has been much discussion in the literature of the azo–hydrazone tautomerism of pigments. All commercial azo pigments with β-naphthol as the coupling compound adopt the hydrazone tautomeric form (Ph—NH—N= C) in the solid state. In contrast, the red pigments 1-[4-(dimethylamino) phenyldiazenyl]-2-naphthol, C18H17N3O,(1a), and 1-[4-(diethylamino) phenyldiazenyl]-2-naphthol, C20H21N3O,(1b), have been reported to be azo tautomers or ...