mathematics

Thiocarbamate

Thiocarbamate is a mathematics 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 Thiocarbamate rather than just read about it. In short: In organic chemistry, thiocarbamates (thiourethanes) are a family of organosulfur compounds. As the prefix thio- suggests, they are sulfur analogues of carbamates.

Key takeaways

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

Reference excerpt

In organic chemistry, thiocarbamates (thiourethanes) are a family of organosulfur compounds. As the prefix thio- suggests, they are sulfur analogues of carbamates. There are two isomeric forms of thiocarbamates: O-thiocarbamates, ROC(=S)NR2 (esters), and S-thiocarbamates, RSC(=O)NR2 (thioesters).

Synthesis Thiocarbamates can be synthesised by the reaction of water or alcohols upon thiocyanates (Riemschneider thiocarbamate synthesis):

RSCN + H2O → RSC(=O)NH2 RSCN + R'OH → RSC(=O)NR'H Similar reactions are seen between alcohols and thiocarbamoyl chlorides such as dimethylthiocarbamoyl chloride; as well as between thiols and cyanates. The herbicide Cycloate is produced in this way:

C6H11(C2H5)NCOCl + C2H5SH → C6H11(C2H5)NCOSC2H5 + HCl Other related thiocarbamate herbicides include vernolate (C3H7)2NCOSC3H7 and triallate ((i−C3H7)2NCOSCH2CCl=CCl2. Salts of thiocarbamate arise by the reaction of amines with carbonyl sulfide:

2 R2NH + COS → [R2NH+2][R2N−COS−]

Reactions In the Newman-Kwart rearrangement O-thiocarbamates can isomerise to S-thiocarbamates. This reaction, which generally requires high temperatures, is an important method for the synthesis of thiophenols.

Occurrence

Goitrin is a cyclic thiocarbamate found in some vegetables.

Uses Thiocarbamate based herbicides (e.g. prosulfocarb) were introduced in 1957 and in 2017 was a $200,000,000 market. Other thiocarbamate herbicides are pebulate, molinate, EPTC, butylate, triallate, vernolate and cycloate.

See also Dithiocarbamate Carbamate Tolnaftate, a thiocarbamate used as an antifungal agent

References

Illustrations

Worked examples

Example 1 — a first encounter with Thiocarbamate

Start with the simplest possible case. Write down what Thiocarbamate claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In mathematics, 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 Thiocarbamate 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 Thiocarbamate 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 Thiocarbamate

In research: Thiocarbamate appears in mathematics 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 Thiocarbamate 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: Thiocarbamate is common in secondary-school and first-year university syllabi. It links to neighbouring topics Functional groups, Thiocarbamates, so understanding it makes those chapters shorter.
In everyday life: Look for Thiocarbamate 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 Thiocarbamate in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Thiocarbamate 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 Thiocarbamate out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Thiocarbamate in simple terms?

In organic chemistry, thiocarbamates (thiourethanes) are a family of organosulfur compounds. As the prefix thio- suggests, they are sulfur analogues of carbamates.

Why does Thiocarbamate matter?

Because it connects several mathematics 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 Thiocarbamate?

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 Thiocarbamate.