ChemInform Abstract: Synthesis and Lewis Acid Properties of (ReO3F)∞ and the X‐Ray Crystal Structures of (HF)2ReO3F·HF and [N(CH3)4]2 [{ReO3(μ‐F)}3(μ3‐O)] ·CH3CN.

Abstract (ReO 3 F) ∞ (I) is prepared as a precursor by solvolysis of Re 2 O 7 in anhydrous HF (aHF) followed by room temperature fluorination of the formed H 2 O.