Abstract
The title compound, C
10
H
10
Cl
2
N
2
O
2
, features a planar C
ar
—N(H)—N=C(Cl) unit [torsion angle = 5.5 (4)°] whose benzene substituent is coplanar with it [dihedral angle = 4.7 (4)°]; this unit is slightly twisted with respect to the carboxyl –CO
2
fragment [dihedral angle = 2.2 (52)°]. The amino group acts as a hydrogen-bond donor to the carbonyl O atom of an adjacent molecule; the hydrogen bond generates a helical polymer that runs along the
b
axis of the monoclinic unit cell.