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Sulfinylamine

Sulfinylamine 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 Sulfinylamine rather than just read about it. In short: Sulfinylamines (formerly N-sulfinyl amines) are organosulfur compounds with the formula RNSO where R = an organic substituent. These compounds are, formally speaking, derivatives of HN=S=O, i.e. analogues of sulfur dioxide and of sulfur diimide.

Sulfinylamine — main illustration
Sulfinylamine — illustration

Key takeaways

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

Reference excerpt

Sulfinylamines (formerly N-sulfinyl amines) are organosulfur compounds with the formula RNSO where R = an organic substituent. These compounds are, formally speaking, derivatives of HN=S=O, i.e. analogues of sulfur dioxide and of sulfur diimide. A common example is N-sulfinylaniline. The S-N bond in sulfinylamines is a dienophile. They undergo [2+2] cycloaddition to ketenes. According to X-ray crystallography, sulfinylamines have planar C-N=S=O cores with syn geometry.

Preparation Sulfinylamines can be made when thionyl chloride SOCl2 reacts with a primary amine. Indeed, the parent, thionylimide (HNSO), can be made that way at low temperature or in the gas phase. Under standard conditions it polymerizes. The corresponding trimethylsilyl compound, Me3SiNSO, is a stable liquid, albeit air-sensitive, and a common "−NSO" synthon.

Reactions A frustrated Lewis pair, such as tris(tert-butyl) phosphine and tris(pentafluorophenyl)borane, can attach to the NSO chain to yield a R'3P=N+(R)SOB−R"3 compound.

Compounds

References

Illustrations

Sulfinylamine: General structure of an N-sulfinyl amine
General structure of an N-sulfinyl amine
Sulfinylamine: N-Sulfinylaniline is a common sulfinylamine
N-Sulfinylaniline is a common sulfinylamine

Worked examples

Example 1 — a first encounter with Sulfinylamine

Start with the simplest possible case. Write down what Sulfinylamine 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 Sulfinylamine 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 Sulfinylamine 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 Sulfinylamine

In research
Sulfinylamine 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 Sulfinylamine 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
Sulfinylamine is common in secondary-school and first-year university syllabi. It links to neighbouring topics Heteroallenes, Organonitrogen compounds, Sulfur(IV) compounds, so understanding it makes those chapters shorter.
In everyday life
Look for Sulfinylamine 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 Sulfinylamine in 20 minutes

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

Frequently asked questions

What is Sulfinylamine in simple terms?

Sulfinylamines (formerly N-sulfinyl amines) are organosulfur compounds with the formula RNSO where R = an organic substituent. These compounds are, formally speaking, derivatives of HN=S=O, i.e. analogues of sulfur dioxide and of sulfur diimide.

Why does Sulfinylamine 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 Sulfinylamine?

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 Sulfinylamine.

Tags

  • Heteroallenes
  • Organonitrogen compounds
  • Sulfur(IV) compounds

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