Crystal structure of ethyl 5-acetyl-2-{[(dimethylamino)methylidene]amino}-4-methylthiophene-3-carboxylate

Abstract

In the title thiophene derivative, C13H18N2O3S, the dihedral angles between the thiophene ring and the [(dimethylamino)methylidene]amino side chain (r.m.s. deviation = 0.009 Å) and the –CO2 ester group are 3.01 (16) and 59.9 (3)°, respectively. In the crystal, inversion dimers linked by pairs of C—H...O hydrogen bonds generate R22(16) loops. The dimers are linked by another weak C—H...O interaction, forming chains along [001]. In addition, weak C—H...π interactions are observed, which link the chains into (001) layers.

Keywords

• crystal structure
• thiophene derivative
• hydrogen bonding
• C—H...π interactions