NEUE METHODEN ZUR HERSTELLUNG VON TRIALKYLPHOSPHANALKADIEN-EISEN(0)-KOMPLEXEN

Article abstract of DOI:10.1016/0022-328X(87)85057-X

Mono(1,3-diene)tris(PR3)iron(0) complexes and bis(1,3-diene)mono(PR3)iron(0) complexes can be synthesized by reduction of FeCl2 with magnesacyclopent-3-ene or activated Mg in the presence of 1,3-dienes and the appropriate PR3 (R = Me, Et, Prⁿ, Cy) ligand.How the various substituted bis(1,3-diene)PR3-Fe⁰ complexes can be obtained from the thermally unstable 1,3-butadiene-tris(PR3)Fe⁰ complexes by addition of 1,3- or 1,5-dienes is showed.The NMR spectra of these complexes indicate that they are square-pyramidal.This geometry was confirmed by a crystal structure analysis of 1,5-COD-1,3-butadiene-iron(0)-PEt3.The probable mechanism of formation of these novel iron(0) complexes is discussed and their characteristic properties are described.