N-(4-Methyl-phenyl-sulfon-yl)maleamic acid.
In the title compound, C(11)H(11)NO(5)S, the dihedral angle between the benzene ring and the amide group is 76.88 (6)°. In the crystal, N-H⋯O(S) and O-H⋯O hydrogen bonds connect the mol-ecules into hydrogen-bonded layers perpendicular to the a axis.
H
H
Purandara
Sabine
S
Foro
B Thimme
BT
Gowda