Structural and physicochemical properties of 3-(3-carboxyphenylaminomethylene)-2-methoxychroman-4-one

The 3-(3-carboxyphenylaminomethylene)-2-methoxychroman-4-one is a derivative of chromanone. It was obtained in condensation reaction of 3-aminobenzoic acid with 3-formylchromone. This ligand was characterized by elemental analysis, infrared and UV–VIS spectroscopy, thermal analysis and X-ray crystallography. The title compound is a new organic heterocyclic ligand which is thermal stable at the room temperature in air atmosphere. During heating on TG curves three steps of decomposition are observed. This process is connected with releasing following gases: CH3OH, CO2, CO and phenol. Compound crystallises in noncentrosymetric group. Molecules are connected by OH⋯O bonds and form chains parallel to the c axis. Structure is stabilized by CH⋯π and π–π interactions. Its solubility in water, methanol and DMF solutions in room temperature were also studied.

► The new organic ligand has been synthesized and its physicochemical properties are described.
► This ligand is the derivative of parent chromanone compounds.
► Molecules with chromanone ring show interesting biological and pharmacological properties.