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 .
The hetero-functionalized phosphines HPN2, H2PNO and HPN-Pip containing tricarbonyl Re(V) complexes i.e. [Re(CO)3(κ3-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.