Coordination chemistry of Fe+, (c-C5H5)Fe+, and (c-C5H5)(2)Fe+ in the gas phase at room temperature: kinetics of sequential ligation with hydrogen cyanide and cyanoacetylene

Measurements with the selected-ion flow tube technique are reported for the room-temperature kinetics of the sequential ligation of Fe+ and (c-C5H5)Fe + with HCN and HC3N in helium bath gas at 0.35 Torr. (c-C5H5)(2)Fe+ was obs erved not to react. Titration curves of the variation in the apparent bimol ecular rate coefficient for ligation with the number of ligands provide cya nide coordination numbers for Fe+ in the absence (4) and presence (3) of c- C5H5.. Multicollision induced dissociation experiments indicate the absence of intramolecular ligand-ligand interaction mediated by Fe+. (C) 2001 Else vier Science B.V.