Synthesis, spectral and electrochemical characteristics of asymmetrical iron(II) tris-dioximates
摘要:
Meridianal- and axial-asymmetrical clathrochelate tris-dioximates of the FeD2D'(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 from a planar-square macrocyclic precursors in the first case and from a semiclathrochelate compounds immobilized on the sorbent surface in the second one. The composition and structure of the isolated compounds have been established from elemental analysis data, polynuclear NMR, Fe-57 Mossbauer and FAB mass spectra. The structure parameters of alpha-benzyldioximate FeBd(3)(BF)(Bn-C4H9) . C6H5CH3 . 1/2C(8)H(16) (Fe-N distance - 1.89 Angstrom, bite angle - 38.6 degrees, polyhedron distortion angle - 17.9 degrees) were determined by X-ray crystallography, The electrochemical properties of the obtained complexes and their dependence on the nature of a ligand have been determined by cyclic voltammetry. (C) 1998 Elsevier Science Ltd. All rights reserved.