Ethyl (Z)-2-chloro-2-[2-(4-meth­oxy­phenyl)hydrazin-1-yl­idene]acetate

The mol­ecule of the title compound, C₁₁H₁₃ClN₂O₃, is planar (r.m.s. deviation = 0.0587 Å for non-H atoms) and adopts a Z conformation about the C=N double bond. In the crystal, mol­ecules are linked via an N—H...O hydrogen bond, forming zigzag chains propagating along [010]. These chains are consolidated by C—H...O hydrogen bonds.

(Z)-Ethyl 2-chloro-2-[2-(4-methyl­phen­yl)hydrazinyl­idene]acetate

The mol­ecule of the title compound, C₁₁H₁₃ClN₂O₂, is approximately planar (r.m.s. deviation = 0.099 Å for non-H atoms) and adopts a Z conformation about the C=N double bond. In the crystal, mol­ecules are linked by N—H...O and C—H...O hydrogen bonds to the same O-atom acceptor, forming zigzag chains propagating along [010]. These inter­actions give rise to R₂¹(6) loops.