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http://dx.doi.org/10.5012/bkcs.2010.31.04.815

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)

Publication Information

Bulletin of the Korean Chemical Society / v.31, no.4, 2010 , pp. 815-818 More about this Journal

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.

Keywords

i-SAT complex; Porphyrin; Tellurium(IV) chloride; Deformation;

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