Crystal structures of the Schiff base derivatives (E)-N′-(1H-indol-3-yl)methyl­ideneisonicotino­hydrazide ethanol monosolvate and (E)-N-methyl-2-1-(2-oxo-2H-chromen-3-yl)ethyl­idenehydrazinecarbo­thio­amide

摘要

The crystal structures of two title Schiff base derivatives, C15H12N4O·C2H6O (>1·EtOH) and C13H13N3O2S (>2), were determined at 110 and 100 K, respectively. In the crystal of compound >1·EtOH, the (E)-N′-[(1H-indol-3-yl)methyl­idene]isonicotinohydrazide and ethanol mol­ecules are linked by O—H⋯O, N—H⋯O and N—H⋯N hydrogen bonds, forming a tape structure running along the b-axis direction. The tapes are weakly linked via a C—H⋯N inter­action. In the crystal of compound >2, (E)-N-methyl-2-[1-(2-oxo-2H-chromen-3-yl)ethyl­idene]hydrazinecarbo­thio­amide mol­ecules are linked via N—H⋯O and C—H⋯O hydrogen bonds, forming a helical chain along the b-axis direction. The chains are further linked into a layer expanding parallel to (102) through C—H⋯S inter­actions.