MACROBICYCLIC D-METAL TRIS-DIOXIMATES OBTAINED BY CROSS-LINKING WITH P-BLOCK ELEMENTS .3. TEMPLATE SYNTHESIS, STRUCTURE AND PROPERTIES OF CLATHROCHELATE TIN-CONTAINING IRON(II) DIOXIMATES FORMED BY TIN TETRACHLORIDE

The template condensation of a number of aliphatic, aromatic and alicyclic dioximes containing tin(IV) tetrachloride on iron(II) ion results in the formation of anionic clathrochelate complexes, which have been isolated and characterized as salts with organic bases of the general compositions [FeD3(SnCl3)2](HAm)2, where D2- is a dioxime dianion and Am is a aliphatic or aromatic amine. The composition and clathrochelate nature of the complexes obtained are confirmed by the results of elementary analysis, by IR, electronic absorption, H-1, C-13{H-1}, Sn-119 NMR and Fe-57, Sn-119 Mossbauer spectra. According to the Fe-57 Mossbauer spectroscopic data, the complexes have a trigonal-antiprismatic geometry of coordination polyhedron with a distortion angle of 40-55-degrees. The 'macrocyclic' ligand field force increase effect for clathrochelate tin-containing complexes is less pronounced than for boron-containing macrobicyclic complexes. The parameters of the Mossbauer and Sn-119 NMR spectra indicate a highly symmetrical octahedral geometry of the cross-linking tin-containing fragment.