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 reacts with to make , KCl and , but also partly yields .
A small percentage of is formed when or reacts with chlorine.
It can be formed from difluoro(germylthio)phosphine: .
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'' symmetry, PS stretch, PCl stretch, PCl bend, scissor, rock, PS op-bend, and PS ip-bend.
The nuclear magnetic resonance coupling constants for are 1220. It is a triplet line with intensities 1:2:1. The chemical shift from orthophosphoric acid is −50×10−6. For the coupling constant is 1218. It is a doublet line in ratio 1:1. The chemical shift from is −15.9×10−6.
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