Crown-templated assembling of the inorganic binuclear fluoro-containing anions in the system ZrO2/HfO2 (Nb2O5/Ta2O5)-HF-H2O-azacrown ether

Six novel complexes, [(HA15C5)2][Ta2F10O] (1), [(HA18C6 · H2O)(A18C6 · H2O)][(H2O) Nb2F9O] · H2O (2), [(HA18C6 · H2O)(M2F10 · 2H2O) · (H3O) · H2O] (3, 4) and [(H2DA18C6)(M2F10 · 2H2O) · 2H2O] (5, 6) (M = Zr, Hf, A15C5 = aza-15-crown-5, A18C6 = aza-18-crown-6, DA18C6 = diaza-18-crown-6) were synthesized and identified by the elemental and X-ray structural analysis.