Crown Ether Complexes of HPCl6

摘要

The reactions of HCl, PCl₅, and a crown ether (12-crown-4 or 18-crown-6) in CHCl₃ under anaerobic conditions give complexes of the superacid HPCl₆: [H(12-crown-4)][PCl₆ ] and [H(18-crown-6)₂][PCl₆]. The crystal structures indicate that the proton lies roughly in the center of the 12-crown-4 molecule in [H(12-crown-4)][PCl₆ ] whereas it lies between two oxygen atoms of two different 18-crown-6 molecules in [H(18-crown-6)₂][PCl₆].