ACES  Vol.2 No.3 , July 2012
Dimerization of 1-Phenyl-1H-Tetrazole-5-Thiol over Metalloporphyrin Catalysts
Abstract: In an alkaline methanol solution, dimerization of 1-phenyl-1H-tetrazole-5-thiol (HL) was carried out over metalloporphyrin catalysts under mild conditions. The dimer product, 1,2-bis (1-phenyl-1H-tetrazol-5-yl) disulfane (L-L), was characterized by determinations of infrared (IR), HPLC, NMR and elementary analysis respectively. In situ UV-Vis spectroscopic analysis and cyclic voltammetric (CV) determinations suggested that the active intermediate for L-L formation is an axially ligated complex, RS-MnⅢTHPP, which decomposes into a MnⅡTHPP molecule and a stable radical (SR) for coupling to form the disulfane. Meanwhile MnIITHPP molecule can be oxidized easily to form MnⅢTHPP species again by oxygen from the air for using in next catalytic circle.
Cite this paper: Y. Wu, J. Yang, Y. Yan, S. Tong, D. Tan, J. Yu and L. Yu, "Dimerization of 1-Phenyl-1H-Tetrazole-5-Thiol over Metalloporphyrin Catalysts," Advances in Chemical Engineering and Science, Vol. 2 No. 3, 2012, pp. 392-397. doi: 10.4236/aces.2012.23047.

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