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Abstract
Monomeric, non-coordinated salts of the dichlorophosphoric, dichlorophosphorothioic and dithioic acid are obtained in high yields by dealkylation of the corresponding methyl esters using quaternary ammonium or phosphonium halides. The mono and dithioate anions react under mild conditions with 4-dimethylaminopyridine as trapping agent to form the thiometaphosphate adducts 11b and 11c. respectively. whereas the dichlorophosphate anion merely yields condensation products. The capability of the title compounds to act as metaphosphate type precursors by chloride ion release may be compared with the analogous behaviour of phosphorochloroimidate and chlorosulfate anions.