Synthesis and quantum chemical calculation of N-(4-sulfophenyl)maleimide and its polymer

N-Glycinylmaleimide was synthesized using maleic anhydride and glycin by two-step reaction. The oligomer of N-glycinylmaleimide was prepared with base as catalyst and the structure of all the products were characterized by IR and H-1 NMR. In terms of different solvent, the geometric structures, electron densities, vibration analysis, thermodynamic properties of N-glycinylmaleimide and its dimer were calculated at B3LYP/6-31lg* and HF/6-31lg* level.