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  • Monday, January 1, 1996
  • (Polysiloxane)-supported metalloporphyrin catalysts: the effect of the support on the catalyst activity and selectivity
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  • H. S. Hilal*, W. Jondi, Sh.Khalaf, A.Keilani, M.Suleiman and A.F.Schreiner,  J. Mol. Catal., 113(1996)35-44.



    Supported tetra(-4-pytidyl)potphyrinato-manganese(II1)

    [MnIII(TPyP)]+ and -tin(W) [SnTPyP)]2+ have been prepared.

    The solid support was iodonated poly(siloxane) surface prepared by condensation reactions of (EtO),Si with

    (MeO),Si(CH,),I. The supported metalloporphyrins were employed as catalysts for the oxidation reactions of 1-octene and

    of cyclohexene. NaBH, was used to reduce [MnIII(TPyP)]+ and [Sn1V(TPyP)]2+ back to their catalytically active Mn” and

    Sn” forms, respectively. Contrary to their homogeneous counterparts, both of the supported metalloporphyrins catalysed the

    cyclohexene oxidation reaction to yield only 2-cyclohexen-l-one with no other products over a reaction time of 10 h. In

    addition to cyclohexene oxidation, the supported [MnIII(TPyP)]+ catalysed I-octene oxidation as well, whereas the

    supported [Sn’“(TPyP)]2+ was inactive for the oxidation of 1-octene.

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Hikmat S. Hilal
Organometallics (organic and inorganic), Materials, Catalysis, Semiconductors, Photoelectro-chemistry
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