Synthesis And Characterization Of Novel Ruthenium-carbene Catalysts

Olefin metathesis is a carbon skeleton redistribution reaction in which unsaturated carbon-carbon bonds are rearranged in the presence of metal carbene complexes. Olefin metathesis reaction under such metal carbene catalysts is tolerant to many functional groups, and is stable to air or moisture. In present of metal carbene complexes, the inert di- or tri- carbon-carbon bonds could be methesized or coupled to form cyclic compounds. This reaction has been a powerful tool for the formation of C-C bonds in organic synthesis. The by-product from the reaction is a volatile olefin such as ethylene. Olefin metathesis is regarded as an atom economical reaction, and thus, it has attracted widespread attention.In this paper, a trinuclear ruthenium carbene complex is presented base on 2,4,6-trichloro-1,3,5-triazine, and is characterized by NMR and IR. Tri-core complex is conformed by NMR. Catalytic study shows that this tri-core complex possess of high catalytic activity to many different olefin ruthenium substrates.Pyrene was found to be able to immobilize on carbon nano tubes viaπ-πintereacti- on. Hereby, we present a pyrene tagged isoproxy styrene ligand and corresponding ru- thenium carbene complex. This complex show highly activity to a number of olefin s- ubstrates. Immobilization of this complex on single-wall-nano tubes is currently under way in the lab.