engleski

Hydrogen phosphate and dihydrogen phosphate salts of 4-aminoazobenzene

4-Amino-trans-azobenzene {; ; or 4-[(E)-phenyl­diazen­yl]aniline}; ; can form isomeric salts depending on the site of protonation. Both orange bis{; ; 4-[(E)-phenyl­diazen­yl]anilinium}; ; hydrogen phos­phate, 2C12H12N3+· HPO42− , and purple 4-[(E)-phenyl­diazen­yl]­anilinium dihydrogen phosphate phosphoric acid solvate, C12H12N3+· H2PO4− · H3PO4, (II), have layered structures formed through O— HO and N— HO hydrogen bonds. Additionally, azobenzene fragments in (I) are assembled through C— H...π inter­actions and in (II) through π – π inter­actions. Arguments for the colour difference are tentatively proposed.

4-aminoazobenzen; fofsat; vodikove veze

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