ISBN: | 978-5-5112-9911-2 |
High Quality Content by WIKIPEDIA articles! The phosphonium (more obscurely: phosphinium) cation describes positively charged polyatomic cations with the chemical formula PR+ 4. Salts of the parent PH4+ are rarely encountered, but this ion is an intermediate in the preparation of the industrially useful tetrakis(hydroxymethyl)phosphonium chloride: