Preparation, Spectral and Thermal Characterization of Two Novel Mixed-Valent and Metal Trinuclear Oxo-centered Complexes

Abstract

Two new oxo-centered trinuclear monochloroacetate complexes, [Mn₂Mn(O)(CH₂ClCOO)₆(py)₃] (1) and [Cr₂Fe(O)(CH₂ClCOO)₆ (H₂O)₃].NO₃ (2), were synthesized and characterized by elemental analysis, infrared and electronic spectroscopy and thermogravimetric analysis. These compounds have a typical μ₃-oxo trinuclear structure: (a) three metal atoms are situated in the apexes of the equilateral triangle; (b) μ₃-oxygen atom and six monochloroacetate ligands fulfill the bridge functions and (c) the monodentate Py or H₂O ligands complete the octahedral geometry of the metal ions.