Trichlorido(tetra-hydro-furan){(1,2,3,3a,7a-η)-1-[2-(1-trimethyl-silyl-1H-imidazol-2-yl-κN)-1-methyl-prop-yl]inden-yl}zirconium(IV).

The title compound, [ZrCl(3)(C(19)H(25)N(2)Si)(C(4)H(8)O)], was prepared from bis-(N,N-dimethyl-amido-κN)(2-{2-[(1,2,3,3a,7a-η)-inden-yl]-2-methyl-prop-yl}-1H-imidazolido-κN(1))zirconium(IV) [(C(16)H(16)N(2))Zr(NMe(2))] by reaction with excess Me(3)SiCl in tetra-hydro-furan (THF) at elevated temperature. The crystal studied contained a minor non-merohedral twin contaminant [6.3†(4)%] which was taken into account during the refinement. The coordination polyhedron of the Zr(IV) atom is a distorted octa-hedron [assuming that the five-membered ring of the indenyl group (Cp) occupies one coordination site], with the Cp group and a THF O atom at the apical positions and the three Cl and ligating N atoms at the equatorial positions. The Zr, Si and the methyl-ene C atoms deviate noticeably from the imidazole ring plane [by -0.197†(5), -0.207†(5) and 0.119†(6)†à , respectively]. The THF ligand adopts an envelope conformation.