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The catalytic activity of poly(siloxane)-supported metalloporphyrins in olefin oxidation reactions: the effect of the support on the catalytic activity and selectivity

Authors
Journal
Journal of Molecular Catalysis A Chemical
1381-1169
Publisher
Elsevier
Publication Date
Volume
113
Identifiers
DOI: 10.1016/s1381-1169(96)00055-6
Keywords
  • Cyclohexene
  • Poly(Siloxane)-Supported Catalysts
  • Manganese
  • Metalloporphyrins
  • Oxidation
  • Siloxane
  • Supported Catalysts
  • Tin

Abstract

Abstract Supported tetra(-4-pyridyl)porphyrinato-manganese(III) [Mn III(TPyP)] + and -tin(IV) [Sn IV(TPyP)] 2+ have been prepared. The solid support was iodonated poly(siloxane) surface prepared by condensation reactions of (EtO) 4Si with (MeO) 3Si(CH 2) 3I. The supported metalloporphyrins were employed as catalysts for the oxidation reactions of 1-octene and of cyclohexene. NaBH 4 was used to reduce [Mn III(TPyP)] + and [Sn IV(TPyP)] 2+ back to their catalytically active Mn II and Sn II forms, respectively. Contrary to their homogeneous counterparts, both of the supported metalloporphyrins catalysed the cyclohexene oxidation reaction to yield only 2-cyclohexen-1-one with no other products over a reaction time of 10 h. In addition to cyclohexene oxidation, the supported [Mn III(TPyP)] + catalysed 1-octene oxidation as well, whereas the supported [Sn IV(TPyP)] 2+ was inactive for the oxidation of 1-octene.

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