SYNTHESIS, REDOX CHEMISTRY AND SOLID-STATE STRUCTURE OF DINUCLEAR ANDTRINUCLEAR FERROCENYL SUBSTITUTED N-ALKYLPYRAZOLYL PYRIDINE COMPLEXES

Di- and trinuclear transition metal complexes were obtained by the rea ction of ferrocenyl substituted pyrazolyl pyridines with Mo(CO)(4)(pip )(2) (pip = piperidine, 5). The structure of the dinuclear complex tet racarbonyl{[5-ferrocenyl-3-(2-pyridyl)-1- pyrazolyl]aceticacidethylest er}molybdenum 6a, was determined by X-ray structure analysis. The redo x properties of the complexes were characterized by cyclovoltammetry. The shifts in reversible potential, observed when the molybdenum tetra carbonyl and ferrocene moieties are attached to the ligand system, wer e consistent with changes observed in spectroscopic parameters.