Specteral study for charge –transfer complexe of  some amine compound  schiff bases with electronic acceptor

Jaber, L.A.Al.

	Specteral study for charge –transfer complexe of some amine compound schiff bases with electronic acceptor
Tikrit Journal of Pure Science
Article 1, Volume 13, Issue 2, 2008, Pages 242-248
Author
L.A.Al. Jaber
Abstract
This work divided into two parts which deals with the study of schiff bases (5) from reaction of (3-methoxy-4-hydroxybenzeldhyde (vaniline) with (5)aromatic amines (3-methoxy-4-hydroxybenylidenen aniline, 3-methoxy-4-hydroxybenylidenen amino pyrmidine, 3-methoxy-4-hydroxybenylidenen amino aniline, 3-methoxy-4-hydroxybenylidenen acetophenone , 3-methoxy -4-hydroxybenylidenenN=N di methyl aniline ) (4) from them are compensatory in a place of ortho . The study contains spectra for these shortening bases that considered as molecules donor for the electrons with groups of molecules acceptor for the electrons ( DDQ, O-CA, PF) as a charge transfer complexes in Dichloromethane, as a Solvents .There has been pursuing of the beam of the charge transition for the complexes and in agreement of Bensi-Heldbrand equation on these complexes .Some of the physical coefficients was accounted for these complexes in a maximam of long of wave like equilibrium constants Kct ( its high value demonstrated on stability of the complexes that formed through the measurments) and molar extinction coefficients Ect ( so its value is less than 1000 to the type of transition that has been in this kind of the complexes ( n _π * ) . Moreover , account the complexse energy Ect and account the ionzation potentials Ip for these bases. Moreover , for account the values efficiency (W) that its value is approximate for one case . The irregul arcase for these complexes . and then drow the ralation between constant donor and with acceptor constant in the five schiff bases with three acceptor make charge transfer complex . The relations have been drawn among the physical changeable ( factors) that produced , and account the Δ G values for these complexes that demontat its values on forming the complexes .

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