Tetra-kis(di-cyclo-hexyl-amido)-zirconium(IV)

Abstract

The reaction of ZrCl₄ with three equivalents of LiNCy₂ (Cy is cyclo-hex-yl) resulted in the formation of tris-(di-cyclo-hexyl-amido)-zirconium chloride and the title compound, [Zr(C₁₂H₂₂N)₄]. The latter is isotypic with its cerium(IV) analogue and crystallizes with three independent mol-ecules in the asymmetric unit. One mol-ecule is located about a twofold rotation axis, and the other two on fourfold inversion axes. In each mol-ecule, the Zr^IV atom has a distorted tetra-hedral coordination environment. The crystal under investigation was twinned by inversion in a 1:1 ratio.

Keywords: amide; crystal structure; isotypism; zirconium.

Figure 1

Representative for the three different mol­ecules of 1 in the asymmetric unit, the mol­ecular structure of complex Zr3 is displayed. Displacement ellipsoids correspond to the 50% probability level. H atoms have been omitted for clarity.

Figure 2

A view along the c axis showing the packing of individual mol­ecules in the crystal of 1. No significant supra­molecular features can be observed. Colour code: C grey, N blue, Zr brown spheres.