4-(2,3-Dihydroxybenzyl-ideneamino)-3-Methyl-1H-1,2,4-Triazol-5(4H)-one

Abstract

All the non-H atoms of the title compound, C<inf>10</inf>H <inf>10</inf>N<inf>4</inf>O<inf>3</inf>, are almost coplanar, the maximum deviation from planarity being 0.065 (3) Å. The dihedral angle between the aromatic rings is 1.66 (6)°. The mol-ecule adopts the enol-imine tautomeric form with an intra-molecular hydrogen-bonding inter-action between the Schiff base N atom and the hydr-oxy group. In the crystal, inter-molecular N - H⋯O and O - H⋯O hydrogen bonds link the mol-ecules into a three-dimensional network.