Synthesis of dihidropiridin and 3,4-dihidropirimidin-2-on compounds and investigation of charge transfer complexes

Key Words: DHP, Monastrol, TCNQ, TCNE, DDQ, I2 ve yük transfer charge transfer complexes. The purpose of this study is to examine how Dihydropiridine ve 3,4- dihydropirimidin?2-on. Electron donor acceptor complexes of DHP and Monastrol as electron donors with TCNE, DDQ, picric acid and I2 as electron acceptors have been examined spectrophotometricly. Stoichiometries of the complexes were determined by Job?s method. Equilibrium constants of the complexes were calculated by Benesi-Hildebrand equation. Thermodynamic constants of the complexes were calculated by Van?t Hoff equation. EDA complexes of DHP ?TCNE gave a maximum absorption at 500 nm. Equilibrium constant of the complex is 184.162 L mol?1, thermodynamic constants of the complex; ?H: -4404.17 cal. mol?1, ?S: -14.3 cal. mol?1, ?Go: -3036.2 cal. mol?1. EDA complexes of DHP ?Picric Asid gave a maximum absorption at 495 nm. Equilibrium constant of the complex is 12.346 L mol?1, thermodynamic constants of the complex; ?H: -1906.34 cal. mol-1, ?S: -4.891 cal. mol?1, ?Go: -1463.1 cal. mol?1. EDA complexes of Monastrol-DDQ gave a maximum absorption at 546 nm. Equilibrium constant of the complex is 12.346 L mol?1, thermodynamic constants of the complex; ?H: -588,39 cal. mol?1, ?S: -4.59 cal. mol?1, ?Go: -2228.1 cal. mol?1. EDA complexes of Monastrol-TCNQ gave a maximum absorption at 742 nm. Equilibrium constant of the complex is 12.346 L mol?1, thermodynamic constants of the complex; ?H: -3619.1 cal. mol-1, ?S: -15.406 cal. mol?1, ?Go: -3607 cal. mol?1. EDA complexes of Monastrol-TCNQ gave a maximum absorption at 370 nm. Equilibrium constant of the complex is 625 L mol?1, thermodynamic constants of the complex; ?H: -221.50 cal. mol?1, ?S: -5.19 cal. mol?1, ?Go: -3747.5 cal. mol?1 dir.