8-[(1E)-1-(2-Aminophenyl-Iminio)Eth-yl]-2-Oxo-2H-Chromen-7-Olate

Abstract

The title Schiff base, C<inf>17</inf>H<inf>14</inf>N<inf>2</inf>O <inf>3</inf>, exists as an NH tautomer with the H atom of the phenol group transferred to the imine N atom. The iminium H atom is involved in a strong intra-molecular N+-H⋯O- hydrogen bond to the phenolate O atom, forming an S(6) motif. In the crystal structure, N-H⋯O hydrogen bonds form a C(9) chain parallel to [100] and a C(11) chain parallel to [010], while C-H⋯O hydrogen bonds form a C(11) chain parallel to [010]. The combination of N-H⋯O and C-H⋯O hydrogen bonds generates R 4 3(30) rings parallel to the ab plane.