Characterisation of the tetrahalophosphonium cations PBrnI4 − n+ (0 ≤ n ≤ 4) by 31P MAS NMR, IR and Raman spectroscopy and the crystal structures of PI4+AlCl4−, PI4+AlBr4− and PI4+GaI4−

• Christoph Aubauer, Martin Kaupp, Thomas M. Klapötke, Heinrich Nöth†, Holger Piotrowski†, Wolfgang Schnick, Jürgen Senker, Max Suter†

• Journal of the Chemical Society Dalton Transactions, January 2001, Royal Society of Chemistry
• DOI: 10.1039/b101197i