الملخص

The new charge-transfer complexes (CT) of eleven Schiff1 bases molecules as n-electron donors with the acceptor 1,4-naphthoquinone were studied spectrophotometrically in chloroform solution. The physical constants (a,b,CI,C2,Ea) of 1,4-naphthoquinone were calculated and they are 0.8385, -4.157, 7.067, 1.92, '1,39 electron volt respectively. where a= slop of straight line of first order equation , hv= alp + b, b=y = interept of first order equation ,( b = hv - alp), Cl and C2 are physical constants of acceptor (eq.3.) ,Ea ~ electron affinity of 1,4 -naphthoquinone , which is calculated from equation ( 1). The physical parameters of the (CT) complexes, of Benesi- Hildebrands equation; ( l/( e K))= slop of equations, b=l/e -intercept y of the straight line of benesi-Hildebrands equation ( of first order), where the molar extinction coefficient= e and K= the equilibrium constant of the formation of bond n-pi (CT) complexes ,' the average dissociation energies of the excited state W=4.70 eV were also calculated and discussed. Key words: Charge-transfer complexes (CT), l,4-Naphthoquinone,Physical chemistry of donor, Acceptor, Aliphatic aldehyde, Valence bond theory, Schrodinger equation and quantizatin , Donor of aliphatic Schiff bases(azomethines). p-N.N-dimethylaminocinnamaylidenes, Aromatic primary a mine , Electromagnetic light photon, 1,4-Quinones and carbonyl conjugation chemistry, Physical calculation, Benesi-Hildebrand's equation , Aliphatic subslituents and their effects, Education and science studies. HOMO' *LUMO transition.