Properties and Configuration of Manganese(II), Cobalt(II), Nickel(II), Copper(II) and Zinc(II) Chelates of Acetoacetylferrocene

Abstract

Abstract Physical and chemical properties of manganese(II), cobalt(II), nickel(II), copper(II) and zinc(II) chelates of acetoacetylferrocene were investigated. The solubility decreased in the order CHCl3>CH2Cl2>C6H5Cl>C6H4(CH3)2>C6H6, the chelates being more soluble in pyridine. It was found from magnetic data that the configuration is octahedral for the aquo or pyridine adduct of manganese(II), cobalt(II) and nickel(II) chelates, square planar for anhydride of copper(II) chelate, distorted octahedral for its pyridine adduct, and quasi-tetrahedral for the anhydride of manganese(II) chelate. The d-d transition of electronic spectra was analysed by Ohsymmetry for cobalt(II) and nickel(II) chelates, and by C2h symmetry for copper(II) chelate. Assignment of the d-d transition for manganese(II) chelate was difficult.