Synthese,Kristallstruktur und Schwingungsspektren von Dimethylphosphoniumtetrachloroaluminat,H2PMe2+AlCl4–

Synthesis, Crystal Structure, and Vibrational Spectra of Dimethylphosphonium Tetrachloroaluminate, H₂PMe₂⁺AlCl₄^– H₂PMe₂⁺AlCl₄^– was synthesized by the reaction of Me₂PH with HCl and AlCl₃ in CH₂Cl₂. The structure of the compound was determined by X‐ray structure determination. H₂PMe₂⁺AlCl₄^– crystallizes in the monoclinic space group P2₁/c with a = 14.445(1), b = 11.344(1) and c = 12.394(1) Å, β = 90.00(1)°, with 8 formula units per unit cell. The frequencies obtained by Raman and infrared spectroscopy were assigned to the normal modes of the H₂PMe₂⁺ and AlCl₄^– units.