ChemInform Abstract: Multiple Bonds Between Main Group Elements and Transition Metals. Part 50. Methylrhenium Oxides: Synthesis from Re2O7 and Catalysis Activity in the Olefin Metathesis.

ChemInform Abstract

The catalyst components (I) and (II) react to give (III) and (IV). (III) provokes the metathesis of open-chain olefins, for example the conversion of 2-pentene into 2-butene and 3-hexene (cis/trans-mixtures), in the presence of AlCl₃ and additional SnMe₄ at room temperature. The system (III)/(II)/AlCl3 can be used also for catalytic ring-opening polymerizations of cyclo-olefins to give polyalkenamers with properties of elastomers. Treatment of (III) with ZnMe₂ leads to further methylation with formation of the spin-paired, diamagnetic compound (VI) (Pn, Z=2), which reacts with (V) in excess to form (VII). The preparations described show new routes to produce the known compounds (III) and (VII) selectively and in high yields. The catalytic properties of the compounds (III), (IV), (VI) and (VII) are discussed.