No abstract

In the title compound, C16H13NO3S, the plane of the amino­benzene ring makes a dihedral angle of 61.04 (6)° with the naphthalene ring system. Both ring systems form weak intra­molecular C—H⋯O hydrogen bonds with the sulfonate group. In the crystal structure, weak inter­molecular N—H⋯O hydrogen bonds and a C—H⋯π inter­action are observed.

In the crystal structure of the title compound, C16H12O3S, the dihedral angle between the naphthalene ring system and the phenyl ring is 65.21 (3)°. The mol­ecules are linked by inter­molecular C—H⋯O hydrogen bonds, forming a chain along the a axis. The chains are connected through weak C—H⋯π inter­actions.

In the title compound, C13H10BrNO, the dihedral angle between the benzene rings is 35.20 (8)°. In the crystal, mol­ecules are linked by O—H⋯N hydrogen bonds, forming a zigzag chain along the a axis. A weak C—H⋯π inter­action is observed between the chains.

In the title compound, C15H12BrNO2S, the dihedral angle between the two aromatic rings is 87.81 (8)°. The five-membered thia­zolidine ring has an envelope conformation, with the S atom displaced by 0.4545 (7) Å from the mean plane of the other four ring atoms. The crystal structure exhibits O—H⋯O, C—H⋯O, C—H⋯Br and C—H⋯ π inter­actions.