Template‐Controlled Organization of a Fluoride Surface—An Analogue of a Crown Ether in the Reaction of [{(η5‐C5Me5)TiF3}2] with Sodium Fluoride

One sodium counterion in 1 can be selectively exchanged for PPh, since the Na ions are distinguishable: complexation of one Na+ ion by two [(Cp*TiF3)2F]− fragments occurs through a “fluoride surface”. The anion in 1 thus belongs to a new class of host–guest complexes, since in molecular recognition studies so far the receptor surfaces of host molecules were almost exclusively formed from O, S, N, and/or P atoms. Cp* = η5-C5Me5.