Russian Journal of General Chemistry p. 1010 - 1017 (2009)
Update date:2022-08-03
Topics:
Zaitseva
Zdanovich
Koifman
The process of intermolecular interaction of zinc-5,15-di(o-nitrophenyl)- octaalkylporphyrin with nitrogen-containing bases of various sturctures was studied using the method of absorption spectroscopy. A dependence of stability of axial zinc-porphyrin complex on electronic effects of nitro groups and basic properties of extra ligand is revealed. By quantum-chemical PM3 method geometric structure and energetic characteristics of optimized molecules of zinc-porphyrin and its axial complexes was calculated. The influence of conformational effects of the porphyrin ligands on the strength of σ-bond of zinc with nitrogen atom of the nitrogen base (Zn-NL) was revealed. It was established that the formation of the Zn-NL bond proceeded with the change in the type and degree of deformation of the macrocycle in the molecular complex. Correlations between the calculated values of energy of Zn-NL bond and stability of the axial complexes were found.
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