Structural depolymerization of titanium(IV) fluoride – the basis of formation fluoride complexes of titanium(IV)

Abstract

Using the proposed concept of structural depolymerization of metal fluoride compounds, the structural depolymerization of titanium(IV) fluoride (TiF₄), which is a basis for the formation of fluoride complexes of titanium(IV) and their crystal structures, in the CsF–TiF₄–aHF, (Gua)₂CO₃–TiF₄–aHF, (Gua)Cl–TiF₄–aHF and Im–TiF₄–aHF (aHF – anhydrous hydrogen fluoride; (Gua)⁺ – guanidinium cation, Im – imidazole) systems was studied. The compositions of the previously received fluoridotitanates(IV) formed in these systems and their structure is now being analyzed. It was shown, that with an increase in the molar ratio of the reagents, the degree of polymerization of the crystal structure of the resulting compounds also decreases. On the example of synthesized imidazolium fluoridotitanates(IV), the application possibility of the concept of structural depolymerization of fluoride compounds of metals to explain the formation mechanism of fluoride complexes of titanium(IV) by sequential depolymerization in HF (or H₂O) solution of fluoridotitanates(IV), containing Ti–F–Ti bridge bonds, by fluorideions was demonstrated.