Synthesis and structure of [Cp2Zr(OPri)(HOPri)]+ and its activity in the polymerisation of propene oxide

Elaine Farrow (1) , Yann Sarazin (1) , David L. Hughes (1) , Manfred Bochmann (1)

1 UEA - University of East Anglia [Norwich]

The reaction of Cp2Zr(OPri)2 with [H(OEt2)2][H2N{B(C6F5)3}2] in dichloromethane at room temperature gives [Cp2Zr(OPri)(HOPri)]+[H2N{B(C6F5)3}2].Et2O in high yield. The crystal structure is reported. The complex contains a short Zr-alkoxide and a longer Zr-alcohol bond; the OH group of the coordinated isopropanol is hydrogen-bonded to a diethyl ether molecule. The complex initiates the polymerisation of propylene oxide, most probably via a cationic mechanism.

Domaines: Chimie

Elaine Farrow, Yann Sarazin, David L. Hughes, Manfred Bochmann. Synthesis and structure of [Cp2Zr(OPri)(HOPri)]+ and its activity in the polymerisation of propene oxide. Journal of Organometallic Chemistry, 2004, 689 (24), pp.4624 - 4629. ⟨10.1016/j.jorganchem.2004.07.012⟩. ⟨hal-01444961⟩