Lewis-acid behaviour of neutral and cationic fluoridotungsten(V) and (VI) complexes
University of Lethbridge. Faculty of Arts and Science
Lethbridge, Alta. : University of Lethbridge, Dept. of Chemistry & Biochemistry
The Lewis-behaviour of WF6 towards pyridine and derivatives thereof has been reinvestigated in detail. The stability of WF6 towards main-group donor ligands has been exploited to develop synthetic routes to numerous complexes of W(NC6F5)F4, [WF5]+, WF5, and [WF4]+ with F– and/or neutral N- and P-donor ligands. The isolation of such species has allowed for fundamental explorations of tungsten-based Lewis acids and weakly coordinating anions, the F–-donating and oxidising characteristics of the transition-metal hexafluorides, and the preparation of robust tungsten(V) complexes derived from thermodynamically unstable WF5. The investigation of structure, bonding, and chemistry in these unique systems was undertaken using a combination of crystallographic, spectroscopic, and computational techniques, exemplifying the structural diversity found in hepta- and octacoordinate tungsten(V) and (VI) complexes.
Lewis acids , Fluorine , Tungsten , Cations , Coordination compounds , Ligands , Dissertations, Academic