In the recently published paper by Liang et al., chlorozincate(ii) anion was identified as [ZnCl3]− based on Raman spectroscopy. According to every textbook and numerous papers, this band corresponds to [ZnCl4]2−.
A series of aza-crown ether ionic liquids supported on magnetic Fe3O4@SiO2 core–shell particles were designed, synthesized and characterized by elemental analysis, TEM, TG and FT-IR.
New Lewis acidic ionic liquids composed of crown ether complex cations were designed, synthesised and characterised by Raman, MS, FT-IR, TGA-DSC and elemental analysis. They have been successfully used in various organic reactions as catalysts.