Ribbed-functionalized iron(ii) tris-dioximate clathrochelates with pendant fragments of various types: synthetic pathways,structures, and properties

Nucleophilic substitution of chlorine atoms in the iron(ii) hexachloride clathrochelate on treatment with thiolate anions afforded hexafunctionalized tris-dioximate complexes with the pendant n-butyl-, n-octylsulfide, silatrane, and captopryl functionalizing groups. These complexes were characterized by elemental analysis, IR, UV-Vis, ¹H and ¹³C NMR, and ⁵⁷Fe Mössbauer spectroscopies, and plasma-desorption mass spectrometry. The crystal and molecular structures of the n-butylsulfide and silatrane clathrochelates were established by X-ray diffraction analysis. Cyclic voltammetry study demonstrated that the Fe²⁺/Fe³⁺ redox process of the encapsulated iron ion is responsible for the electrochemical behavior of the prepared compounds in solution.