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Dimerization of 1-Phenyl-1H-tetrazole-5-thiol over Metalloporphyrin Catalysts

By Yahong Wu, Junwei Yang, Yan Yan, Shanling Tong, Di Tan, Jian Yu and Lin Yu


In an alkaline methanol solution, dimerization of 1-phenyl-1H-tetrazole-5-thiol (HL) was carried out over metallopor-phyrin 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 for-mation 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

Topics: Disulfane, Dimerizatoin, Catalytic Conversion, Metalloporphyrin Catalyst
Year: 2012
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