Structure and properties of 1-(2-pyridyl)-3-phenyl-5-arylformazans
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A series of 1-(2-pyridyl)-3-phenyl-5-arylformazans, which form deeply colored complexes with Zn2+, Cu2+, Co2+, and Ni2+ salts, were obtained by coupling of arenediazonium salts, containing various substituants in the phenyl ring, with benzaldehyde 2-pyridylhydrazone. The presence of a nitro group causes deepening of the color and leads to the appearance of negative solvatochromism.
KeywordsColor Organic Chemistry Phenyl Benzaldehyde Phenyl Ring
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