Evaluation of optical absorption measurements of charge transfer complexesof some dimethoxynaphthalenes with tetracyanoethylene: Integral absorptionmethod

Integral absorption (IA) method is a new numerical multidimensional techniq ue, which is used for the estimation of molecular quantities as molar absor ption coefficient (kappa(4)) and equilibrium constant (K-4) of complex form ation with less errors. On the basis of IA method three relationships are d erived, which can be applied for all ratios of donor / acceptor concentrati ons. The method is applied for investigation of CTC's formed between some d imethoxynaphthalenes as: 1,4 dimethoxynaphthalene (1,4-DMN), 1,5-DMN, 1,8-D MN, 2,3-DMN, 2,6-DMN and 2,7-DMN with tetracyanoethylene (TCNE) in CH2Cl2 a t a few temperatures. The geometrical structure, but not the ionization pot entials, of the donors plays a major role in the stability of the complexes .