Abstract
A theoretical analysis of the charge-transfer bands obtained with m-chlorophenyl hydrazone of carbonyl cyanide (CPHC) with different electron donors has been made using a two structure resonance model. The values of the resonance integral and enthalpy of formation of CPHC-complexes show that they are stronger than halogen atom and tetracyanoethylene complexes of aromatic bases. The values of resonance energies and ionic character for ground and excited states have also been calculated. The deviation in the slope from unity in ECT vs. ID plots of most of the CT complexes has been explained by using a new correlation formula. The calculated values of free energies of dissociation for the present systems show a constant value for a similar class of donors.
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