Darstellung und struktur von Cp 2ZrX 2 und [Cp 2Zr(X)(H 2O) 2] + X −(X = toluolsulfonat)

Abstract

Cp 2Zr(C 7H 7SO 3) 2 ( C) can be prepared from Cp 2ZrCl 2 and silver toluenesulfonate in acetonitrile. Reaction of C with H 2O gives the ionic 18-electron species [Cp 2Zr(C 7H 7SO 3)(H 2O) 2] + C 7H 7SO 3 − ( D). The structures of both complexes have been determined by X-ray analyses. The Cp 2Zr units in C and D have the usual bent metallocene structure. The metal-bonded O atoms of the three additional ligands in D lie in a plane bisecting the plane of the Cp ligands, the C 7H 7SO 3 group being symmetrically flanked by the H 2O ligands. The H 2OZrOH 2 angle is 148°. On the other hand, the OZrO angle of 90° in C is relatively small for a Cp 2ZrX 2 compound.