Structural studies of 1-phenyl-2,3-dimethyl-5-oxo-1,2-dihydro-1H-pyrazol-4-ammonium 2[(2-carboxyphenyl) disulfanyl]benzoate

► The reaction between 4-aminoantipyrine and 2-mercaptobenzoic acid resulted in a proton transfer salt. ► This compound crystallize in the space group P-1. ► The ion-pair units are interlinked by hydrogen bonds forming a ID supramolecular network. ► Spectral studies (IR, NMR, Mass) confirm the formation of proton transfer salt. ► The compound shows thermal stability upto 260 °C.