D. R. Chrisope, K. Park, G. Schuster
Aug 1, 1989
Citations
0
Influential Citations
34
Citations
Journal
Journal of the American Chemical Society
Abstract
Cyclopentadienyliron(II) arene cations ((CpFeArH){sup +}) exist in solution as a mixture of freely solvated ions and as ion pairs with an anionic counterion (X{sup {minus}}). Irradiation of either the free ion or the ion pair in solutions containing benzonitrile (PhCN) leads to loss of the arene ligand and formation of a tris-nitrile complex ((CpFe(PhCN){sub 3}){sup +}). Two important reactive intermediates are detected by time-resolved laser spectroscopy. One, formed from irradiation of the ion pair, is assigned as the ring-slipped {eta}{sup 4}-arene-Cp-iron compound covalently bound to its counterion. The other, formed from irradiation of freely solvated cations, is assigned as the coordinatively unsaturated ring-slipped Cp-iron-{eta}{sup 4}-arene compound. The role of these intermediates in the ligand-exchange reaction was examined.