Synthesis, characterization and investigation of homogeneous oxidation activities of peripherally tetra-substituted Co(II) and Fe(II) phthalocyanines: Oxidation of cyclohexene

详细信息    查看全文

• 作者：Zekeriya B?y?kl?o?lu ; Ece Tu?ba Saka ; Serpil G?k?e ; Halit Kantekin
• 关键词：Phthalocyanine ; Iron ; Cobalt ; Cyclohexene ; Oxidation ; Tert-butyl hydroperoxide
• 刊名：Journal of Molecular Catalysis A: Chemical
• 出版年：2013
• 出版时间：1 November, 2013
• 年：2013
• 卷：378
• 期：Complete
• 页码：156-163
• 全文大小：1448 K

文摘

The synthesis and characterization of novel peripherally tetra-substituted iron(II) 4 and cobalt(II) 5 phthalocyanines are described for the first time in this study. All the new compounds are characterized by a combination of IR, ¹H and ¹³C NMR, mass and UV-vis spectroscopy techniques. Complexes 4 and 5 served as catalyst for the oxidation of cyclohexene using different types of oxidants, such as tert-butyl hydroperoxide (TBHP), m-chloroperoxybenzoic acid (m-CPBA), aerobic oxygen and hydrogen peroxide (H₂O₂). During the oxidation process the products formed are 2-cyclohexene-1-ol, 2-cyclohexene-1-one and cyclohexene oxide. The selectivity for 2-cyclohexene-1-ol is favored when iron(II) and cobalt(II) phthalocyanine catalysts are employed. The higher conversion is obtained as catalyst iron(II) phthalocyanine (96 % ). TBHP was determined as the successful oxidant with the minimum demolition of the catalyst, superior selectivity and conversion in the oxidation products.