The reaction of Cp'2NdCl2 -Li(ether), +(cp' =5-(ch3)5c5) with LiCH[Si(CH3)3]2yields the early lanthanide alkyl Cp'2NdCH[Si(CH3)3]2(1). The molecular structure of this complex features an unusually short Nd-methyl contact. Reaction of 1 with hydrogen yields the highly reactive hydride (Cp' ‘2NdH)2(3). At 25 °C, 1-atm gas pressure, 3 polymerizes ethylene with Nt> 80 000 min-1and hydrogenates 1-hexene with Nt= 77 000 h-1. Cyclohexene is hydrogenated with Nt= 8300 h-1. Kinetic measurements indicate that Nd-C hydrogenolysis is rate limiting for 1-hexene and that hydride + olefin addition is rate limiting for cyclohexene.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Organic Chemistry
- Inorganic Chemistry