Penta-arylcyclopentadienyl complexes

This review covers the coordination and general chemistry of the 1,2,3,4,5-penta-arylcyclopentadiene system, as anion, C5Ar5-, radical, C5Ar5 center dot, and cation, C5Ar5+, as well as the neutral diene, C5Ar5H, and its derivatives. The structural rigidity and steric saturation offered by the penta-arylcyclopentadienyl ligand give rise to definite structural and geometric properties in its complexes that distinguish its chemistry from that of the parent cyclopentadiene. (C) 2011 Elsevier B.V. All rights reserved.