chemistry

Phosphorothioic chloride difluoride

Phosphorothioic chloride difluoride is a chemistry topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Phosphorothioic chloride difluoride rather than just read about it. In short: Phosphorothioic chloride difluoride or thiophosphoryl chloride difluoride is a chemical compound with formula PSClF2. It is normally found as a gas boiling at 6.3 °C and melting at −155.2 °C.

Key takeaways

Phosphorothioic chloride difluoride belongs to chemistry; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Phosphorothioic chloride difluoride to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Phosphorothioic chloride difluoride from memory before moving on to harder problems.

Reference excerpt

Phosphorothioic chloride difluoride or thiophosphoryl chloride difluoride is a chemical compound with formula PSClF2. 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 PSCl3 with SbF3 and SbCl5 at 75 °C. In another reaction PSCl3 reacts with KSO2F to make PSF3, KCl and SO2, but also partly yields PSClF2. A small percentage of is formed when F2P(=S)−S−P(−CF3)2 or (F3C−)2P(=S)−S−PF2 reacts with chlorine. It can be formed from difluoro(germylthio)phosphine:

F2P−S−GeH3 + Cl2 → GeH3Cl + S=PClF2

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 PF2 symmetric stretch in a' and a'' symmetry, PS stretch, PCl stretch, PCl bend, PF2 scissor, PF2 rock, PS op-bend, and PS ip-bend. The nuclear magnetic resonance coupling constants for 31P are 1220. It is a triplet line with intensities 1:2:1. The chemical shift from orthophosphoric acid is −50×10−6. For 19F the coupling constant is 1218. It is a doublet line in ratio 1:1. The chemical shift from CCl3F is −15.9×10−6.

References

Illustrations

Worked examples

Example 1 — a first encounter with Phosphorothioic chloride difluoride

Start with the simplest possible case. Write down what Phosphorothioic chloride difluoride claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In chemistry, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Phosphorothioic chloride difluoride before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Phosphorothioic chloride difluoride ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Phosphorothioic chloride difluoride

In research: Phosphorothioic chloride difluoride appears in chemistry research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Phosphorothioic chloride difluoride in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Phosphorothioic chloride difluoride is common in secondary-school and first-year university syllabi. It links to neighbouring topics Phosphorus halides, Thiophosphoryl compounds, so understanding it makes those chapters shorter.
In everyday life: Look for Phosphorothioic chloride difluoride outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Phosphorothioic chloride difluoride in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Phosphorothioic chloride difluoride means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Phosphorothioic chloride difluoride out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Phosphorothioic chloride difluoride in simple terms?

Phosphorothioic chloride difluoride or thiophosphoryl chloride difluoride is a chemical compound with formula PSClF2. It is normally found as a gas boiling at 6.3 °C and melting at −155.2 °C.

Why does Phosphorothioic chloride difluoride matter?

Because it connects several chemistry ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Phosphorothioic chloride difluoride?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Phosphorothioic chloride difluoride.