Issue 1, 2013

The organometallic chemistry of cycloheptatrienyl zirconium complexes

Abstract

This tutorial review summarizes the organometallic chemistry derived from the half-sandwich complex [(η7-C7H7)ZrCl(tmeda)], which was used as an efficient and versatile starting material for the incorporation of monoanionic ligands into the cycloheptatrienyl zirconium coordination sphere by conventional salt metathesis reactions. A broad variety of ligands was employed, affording novel and previously inaccessible cycloheptatrienyl (sandwich) complexes of the type [(η7-C7H7)Zr(Y)]; Y comprises pentadienyl, cyclopentadienyl, allyl, phospholyl, boratabenzene, imidazolin-2-iminato and amido systems. The cycloheptatrienyl ring in these systems usually acts as an “innocent spectator ligand”, but reactivity can arise from the second ligand Y or the Lewis acidity of the, formally, Zr(+IV) center, which was probed in selected examples and put in perspective to related studies. The corresponding results emphasize why the use of [(η7-C7H7)ZrCl(tmeda)] is clearly an advancement in the chemistry of the still fairly unexplored area of cycloheptatrienyl transition metal complexes.

Graphical abstract: The organometallic chemistry of cycloheptatrienyl zirconium complexes

Article information

Article type
Tutorial Review
Submitted
08 Aug 2012
First published
01 Oct 2012

Chem. Soc. Rev., 2013,42, 128-142

The organometallic chemistry of cycloheptatrienyl zirconium complexes

A. Glöckner and M. Tamm, Chem. Soc. Rev., 2013, 42, 128 DOI: 10.1039/C2CS35321K

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