Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Sandwich Intermediate Sitting-atop Complexation between Free Base meso-tetraarylporphyrins and Tellurium(IV) chloride

  • Dehghani, Hossein (Department of Inorganic Chemistry, Faculty of Chemistry, University of Kashan) ;
  • Bakhshayesh, Sara (Department of Inorganic Chemistry, Faculty of Chemistry, University of Kashan) ;
  • Shaterian, Maryam (Department of Inorganic Chemistry, Faculty of Chemistry, University of Kashan) ;
  • Motamedi, Leila (Department of Inorganic Chemistry, Faculty of Chemistry, University of Kashan)
  • Published : 2010.04.20
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Abstract

Free base meso-tetraarylporphyrins ($H_2T(X)PP$) react with tellurium(IV) chloride ($TeCl_4$) in mild conditions for formation sandwich intermediate sitting-atop (i-SAT) complexes, [$TeCl_4(H_2T(X)PP)_2$]. $^1H$ NMR, $^{13}C$ NMR, UV-vis, FT-IR and elemental analysis were used for characterization of the products. In the proposed structure of the i-SAT complexes, four pyrroles of each porphyrin ring are tilted alternatively up and down and this appropriates suitable orientation of lone pairs of two pyrrolenine nitrogens for electron donation to a tellurium center. $^1H$ NMR and FT-IR results showed that in the produced complex, hydrogen atoms of porphyrin macrocycles remained on the pyrrole nitrogens.

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References

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