(2R)-2-Benzene-sulfonamido-2-phenyl-ethanoic acid

Crystal structure of 2-benzene-sulfon-amido-3-hy-droxy-propanoic acid

In the title compound, C9H11NO5S, the O=S=O plane of the sulfonyl group is twisted at a dihedral angle of 52.54 (16)° with respect to the benzene ring. The dihedral angle between the carb-oxy-lic acid group and the benzene ring is 49.91 (16)°. In the crystal, C-H⋯O, N-H⋯O and O-H⋯O hydrogen bonds link the mol-ecules into (001) sheets.

(2S)-3-Carbamoyl-2-(4-meth-oxy-benzene-sulfonamido)-propanoic acid

In the title compound, C(11)H(14)N(2)O(6)S, an amino acid-derived sulfonamide, the acetamido group and the carb-oxy-lic group are oriented at dihedral angles of 45.84 (5)° and 47.97 (5)° respectively, with respect to the aromatic ring. In the crystal, the mol-ecules are connected by N-H⋯O and O-H⋯O hydrogen bonds and weak C-H⋯O inter-actions, forming a three-dimensional network.

N-(p-Tolyl-sulfon-yl)-l-asparagine

In the title compound, C₁₁H₁₄N₂O₅S, the amide O atom acts as a hydrogen-bond acceptor from a carboxyl­ate O atom and a secondary amino N atom. In addition, one of the sulfonyl O atoms and the carbonyl O atom of the carboxyl group also form hydrogen bonds with the primary amido N atom. These intermolecular hydrogen-bonding inter­actions give rise to a layer structure, with the layers parallel to the ac plane.

N-(Phenyl-sulfon-yl)-l-asparagine

In the title compound, C₁₀H₁₂N₂O₅S, one of the sulfonyl O atoms is hydrogen bonded to the amido N atom of an adjacent mol­ecule. There is also a weak hydrogen-bonding inter­action between the other sulfonyl O atom and the secondary amino N atom. In addition, the amido O atom is also hydrogen bonded to a carboxyl O atom. These hydrogen-bonding inter­actions give rise to a layer structure parallel to the bc plane.

(2R)-2-Benzene-sulfonamido-2-phenyl-ethanoic acid: a new monoclinic polymorph

In the title compound, C₁₄H₁₃NO₄S, a sulfonamide derivative of phenyl glycine, the aromatic rings are inclined at a dihedral angle of 28.03 (12)°. In the crystal, O—H⋯O hydrogen bonds link the molecules into chains propagating in [100] and a weak C—H⋯O interaction cross-links the chains in the c-axis direction. In the previously published polymorph, the dihedral angle between the aromatic rings is 45.52 (18)° and the structure is stabilized by three different types of ring motif.

2-(4-Bromobenzenesulfonamido)-2-phenylacetic acid monohydrate

In the title compound, C₁₄H₁₂BrNO₄S·H₂O, the phenyl and benzene rings are inclined at a dihedral angle of 39.5 (5)°. The crystal packing is stabilized by N—H⋯O, C—H⋯O and O—H⋯O hydrogen-bonding inter­actions.