Phosphorothioic chloride difluoride
Phosphorothioic chloride difluoride or thiophosphoryl chloride difluoride is a chemical compound with formula. It is normally found as a gas boiling at 6.3 °C and melting at −155.2 °C. The density of the gas at standard conditions is 5.579 g/L. Critical pressure is 41.4 bars, and critical temperature is 439.2 K.
Production
Phosphorothioic chloride difluoride was made in 1940 by reacting with and at 75 °C.In another reaction [thiophosphoryl chloride|] reacts with to make [thiophosphoryl fluoride|], KCl and [sulfur dioxide|], but also partly yields.
A small percentage of is formed when or reacts with chlorine.
It can be formed from difluorophosphine:
Properties
Although phosphorothioic chloride difluoride does not spontaneously ignite in air, mixtures with air are explosive. The gas is hydrolysed slowly by water vapour. It also reacts with potassium hydroxide solution.Heat of vaporization is 5703 cal/mol.
Infrared bands in the gas are at 946, 920, 738, 541, 395, 361, 317, missed, and 198 cm−1. In liquid, a Raman spectroscopy has bands at 939, 913, 727, 536, 394, 359, 314, 251, 207. These are for symmetric stretch in a' and a
The nuclear magnetic resonance coupling constants for [Phosphorus-31 nuclear magnetic resonance|] are 1220. It is a triplet line with intensities 1:2:1. The chemical shift from orthophosphoric acid is −50×10−6. For [Fluorine-19 nuclear magnetic resonance|] the coupling constant is 1218. It is a doublet line in ratio 1:1. The chemical shift from [Trichlorofluoromethane|] is −15.9×10−6.