Abstract
The title compound, C
10
H
11
ClN
2
O
2
, features an almost planar C
ar
—N(H)—N=C(Cl) unit [torsion angle = 0.8 (1)° whose phenyl substituent is almost coplanar with it [dihedral angle = 2.8 (2)°]; this unit is slightly twisted with respect to the carboxyl –CO
2
fragment [dihedral angle = 10.3 (2)°]. In the crystal, the amino group acts as a hydrogen-bond donor to the carbonyl O atom of an adjacent molecule; the hydrogen bond generates a helical chain that runs along the
b
axis of the monoclinic unit cell.