Gopal Mishra - Hydro-reformation of saturated hydrocarbons with novel MCM-41 immobilized Re(V) complex catalysts.

Version 1

      Publication Details (including relevant citation   information):

      Gopal  S.   Mishra*, Anil Kumar, Applied Catalysis A: General,   429-430 (2012) 1 - 8, Hydro-reformation of saturated hydrocarbons   with novel MCM-41 immobilized Re(V) complex catalysts   .

      Abstract:

      The hetero-functionalized phosphines HPN2,   H2PNO and HPN-Pip containing tricarbonyl Re(V)   complexes i.e.  [Re(CO)33-PN2)]   (I),   [Re(CO)3Br(κ2-H2PNO)]   (II) and   [Re(CO)3Br(κ2-HPN-Pip)]   (III) were covalently bonded to modified and   MCM-41 to obtain novel supported hybrid catalysts. Remarkable   high catalytic effects were observed with these catalysts in the   hydroisomerization of n-alkanes at low temperature. The   catalyst II/MCM-41 provided the highest TONs   3.32 × 103 with 37 % yield for n-hexane and   3.18 × 103 with 30 % yield for n-heptane.   Under optimized condition, good selectivities for   n-hexane (85 %) and for n-heptane (91 %) were   obtained.. The TGA was used to evaluate the stability of   catalysts and reusable for several cycles. A possible   carbenium-based mechanism been used to explain product formation.

      Address (URL): http://ac.els-cdn.com/S0926860X12001512/1-s2.0-S0926860X12001512-main.pdf?_tid=9 dbef9f67ce7a9f8f28da406d204cede&acdnat=1338476410_ef3eeb63061d94f0eba7e9ce3f6c32 9c