Synthesis, spectral and electrochemical characteristics of asymmetrical iron(II) tris-dioximates

Meridianal- and axial-asymmetrical clathrochelate tris-dioximates of the Fe D2D'(BF)(2) and FeD3(BX)(Y) types (where D,D' = dioximes dianions, X = C6H5 , F; Y = BF, Bn-C4H9, SnCl3) have been prepared by a stepwise synthesis fro m a planar-square macrocyclic precursors in the first case and from a semic lathrochelate compounds immobilized on the sorbent surface in the second on e. The composition and structure of the isolated compounds have been establ ished from elemental analysis data, polynuclear NMR, Fe-57 Mossbauer and FA B mass spectra. The structure parameters of alpha-benzyldioximate FeBd(3)(B F)(Bn-C4H9) . C6H5CH3 . 1/2C(8)H(16) (Fe-N distance - 1.89 Angstrom, bite a ngle - 38.6 degrees, polyhedron distortion angle - 17.9 degrees) were deter mined by X-ray crystallography, The electrochemical properties of the obtai ned complexes and their dependence on the nature of a ligand have been dete rmined by cyclic voltammetry. (C) 1998 Elsevier Science Ltd. All rights res erved.