STRUCTURE ASPECTS OF KINETICS AND THERMODYNAMICS OF THE TEMPLATE SYNTHESIS AND DECOMPOSITION REACTIONS OF BORON-CONTAINING CLATHROCHELATE IRON(II) DIOXIMATES

A photometric study of the kinetics and thermodynamics of template syn thesis and decomposition reactions of macrobicyclic tris-cyclooctanedi one-1,2-dioximates (octoximates) FeOx(3)(BR)(2), where R=Bn-C4H9 and C 6H5, and tris-cycloheptandione-1,2-dioximate (heptoximate), FeGx(3)(BR ')(2), where R'=n-C3H7, in diluted solutions has been performed. The c rystal and molecular structures of FeOx(3)(Bn-C4H9)(2) . CCl4 and FeGx (3)(Bn-C3H7)(2) complexes have been solved. The electronic absorption spectra of solution for starting dioximes and their clathrochelate bor on-containing iron(II) complexes have thoroughly been examined. Some s pecific features in the structure of alpha-dioximate fragments of the dioxime molecules and resulted clathrochelates in crystals as well as the electronic absorption spectra characteristics for their solutions have been analyzed along with the kinetic and thermodynamic parameters of synthesis and decomposition reactions. These parameters were found to be predominantly affected by the magnitude of a torsion angle in t he chelate ring.