Transition metal arene complex

The principles that describe arene complexes extend to related organic ligands such as many heterocycles (e.g. thiophene) and polycyclic aromatic compounds (e.g.

The method was demonstrated in the 1950s with the synthesis of bis(benzene)chromium by Walter Hafner and his advisor E. O.

Although many metal-arene complexes are robust, few are prepared by the direct reaction of arenes with metal salts.

The strength of the metal-arene interaction is weak as indicated by the long Ag-C bond lengths and the nearly unperturbed nature of the arene.

Instead, arene complexes of these metals are typically prepared by treatment of M(III) precursors with cyclohexadienes.

The C-C-C angles are unperturbed vs the parent arene, but the C-C bonds are elongated by 0.2 Å.

[8] When bound in the η6 manner, arenes often function as unreactive spectator ligands, as illustrated by several homogeneous catalysts used for transfer hydrogenation, such as (η6-C6R6)Ru(TsDPEN).