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The reactivity of a di-tert-butylallenylidene tetracarbonyliron complex (1) and a ,μ-di-tert-butyl-allenylideneoctacarbonyldiiron (2) compound towards triphenylphosphane and pyridine were investigated. The reaction of 1 with PPh 3  results in the formation of an ylid complex, di-tert-butylallenylidenetriphenylphosphorane tetracarbonyliron (3). 2 reacts with L = PPh 3  with substitution of one or two CO molecules to give (tBu) 2 C 3 Fe 2 (CO) 7 L 4 and (tBu) 2 C 3 Fe 2 (CO) 6 L 2  5 compounds. Pyridin (py) causes initial displacement of one CO ligand in 2 but subsequent rearrangement results in the formation of 3-t-butyl-4-dimethyl-2-(2-pyridino)pent-2-ene-lylideneheptacarbonyldiiron(0) system (7).

zeitschrift für naturforschung b

Reaktionen von Eisenallenyliden-Verbindungen mit Triphenylphosphan und Pyridin / Reactions of Allenylidene Iron Compounds with Triphenylphosphane and Pyridine