Gopal Mishra - Immobilized Pd complexes over MCM-41 as supported catalysts for effective reformation of hydrocarbons

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      Graphical abstract: Immobilized Pd complexes over MCM-41 as supported catalysts for effective reformation of hydrocarbons

      Abstract:

        The ethylthio alkane ligands   i.e.   di(ethylthio)ethane, I,   and di(ethylthio)propane, II,   have been used for the synthesis of Pd(II)   complexes. These complexes were covalently anchored to the   modified MCM-41 matrix as supported hybrid catalysts   (MCM-41/I   as Pd–I   and MCM-41/II   asPd–II).   Remarkable catalytic effects were observed when these supported   catalysts act in   n-hexane   and   n-heptane   reformation reactions in the presence of H2.   Catalyst Pd–I   provided the high TONs of 2325 with 91% selectivity for    n-hexane   and high TONs of 2145 with 88% selectivity for   n-heptane   under optimized and relatively mild conditions. A carbenium-based   mechanism has been included to explain the product formation. TGA   analysis indicates that these catalysts were thermally stable up   to the reaction temperature and recyclable for further   utilization.

      Address (URL): http://pubs.rsc.org/en/content/articlepdf/2011/cy/c1cy00170a?page=search