F−/OH− substitution in [H4tren]4+ and [H3tren]3+ hydroxyfluorotitanates(IV) and classification of tren cation configurations

The ratio of the relative intensities of the 19F NMR lines assigned to F atoms belonging to isolated TiF6−x(OH)x octahedra and to “free” fluoride ions shows that the F−/OH− substitution concerns only F atoms bonded to titanium.