Reactions of Transition Metal Ions with Cycloalkanes and Metal Carbonyls
It has long been known that metal containing ions formed by electron impact on metal compounds undergo a variety of interesting ion molecule reactions. The formation of “triple-decker sandwiches” in the ion molecule reactions of ferrocene and nickelocene was reported in 1966 (Schumacher and Taubenest, 1966). Cationic clustering reactions in metal carbonyls were reported in 1971 (Kraihanzel, Conville and Sturm, 1971 and Foster and Beauchamp, 1971). Clustering reactions of transition metal containing anions were reported in 1973 (Dunbar, Ennever and Fakler, 1973). Reactions of metal containing ions with ligand molecules were described in 1971 (Muller and Fenderl, 1971, and Foster and Beauchamp, 1971). Proton affinities of transition metal complexes were reported in 1975 (Foster and Beauchamp, 1975a and 1975b). Observation of alkane activation by a transition metal containing ion was first reported in 1973 (Muller and Goll, 1973). This early work led to a substantial body of research on organometallic ion molecule reactions. Rather than attempt to review that work, this discussion will emphasize (1) some recent developments in the study of reactions involving the formation of metal to carbon bonds and (2) clustering reactions in transition metal carbonyls. In doing this, the significance of the unique properties of transition metals and the use of a variety of mass spectrometric techniques to solve problems in transition metal ion chemistry will be discussed.
KeywordsMetal Carbonyl Electron Deficiency Formal Oxidation State Cluster Reaction Steric Energy
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