1,1 ' Ferrocenylenediol as chelating ligand for cobalt in fivefold and sixfold coordination geometry: Synthesis, Electrochemistry and X-ray crystal structure of [{((1,1 ' O-2(eta(5)-C5H5)(2)Fe)(2)}Co(OEt2){(eta(5)-Me5C5)Co}(2)] and [{((1,1 ' O-2(eta(5)-C5H5)(2)Fe)(3)}Co((eta(5)-EtMe4C5)Co)(2)]

摘要

The title compounds 3 and 4 were synthesized by reaction of 1,1' ferrocenylenediol with the Co triple decker compounds [{(eta(5)-Me5C5)Co}(2)(eta(6):eta(6)-toluene)] and [{(eta(5)-EtMe4C5)Co}(2)(eta(6):eta(6)-toluene)], respectively. The central Co atom of 3 is coordinated by five O atoms in a square-pyramidal manner. The remaining two Co atoms of 3 are coordinated to a Me5C5 ligand in a eta(5)-fashion and by the two O atoms of two 1,1' ferrocenylenediolato ligands which serve as chelating ligands. In 4, the central Co atom is coordinated to all six O atoms of three ferrocenylenediolato ligands in a trigonal-prismatic manner, whereas the two other Co atoms are coordinated by an EtMe4C5 ligand in a eta(5)-fashion and by three O atoms of three ferrocenylenediolato ligands resulting in an overall tripoidal structure for 4.