Clathrochelate tin-containing iron(II) dioximates formed by tin bromide and fluoride: Synthesis and spectra

The reactions of encapsulation of iron(II) by template cross-linking of tris-dioximates with tin(IV) bromide and fluoride have been studied. The clathrochelate structures of synthesized complexes of the general composition (HAm)(2)[FeD3(SnX3)(2)] (where D2- is the dianion of the corresponding dioxime, X - fluoride or bromide, Am - organic amine) were confirmed by elemental analysis, IR, NMR(H-1, C-13 {H-1}, F-19, Sn-119) and Mossbauer (Sn-119) spectra. The distorted trigonal antiprismatic coordination surrounding of iron(II) atom and electron density distribution was obtained from Mossbauer (Fe-57) parameters. For synthesized clathrochelate complexes of methylglyoxime two isomers (fac and mer) have been identified from NMR (C-13 {(II)-I-1}, Sn-119) spectra.