chemistry

Tiglic acid

Tiglic acid 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 Tiglic acid rather than just read about it. In short: Tiglic acid is a monocarboxylic unsaturated organic acid. It is found in croton oil and in several other natural products.

Key takeaways

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

Reference excerpt

Tiglic acid is a monocarboxylic unsaturated organic acid. It is found in croton oil and in several other natural products. It has also been also isolated from the defensive secretion of certain beetles.

Properties and uses Tiglic acid has a double bond between the second and third carbons of the chain. Tiglic acid and angelic acid form a pair of cis-trans isomers. Tiglic acid is a volatile and crystallizable substance with a sweet, warm, spicy odour. It is used in making perfumes and flavoring agents. The salts and esters of tiglic acid are called tiglates.

Toxicity Tiglic acid is a skin and eye irritant. The inhalation of the substance causes respiratory tract irritation. It is listed on the Toxic Substances Control Act (TSCA).

Names and discovery In 1819 Pelletier and Caventou isolated a peculiar volatile and crystallizable acid from the seeds of Schoenocaulon officinalis, a Mexican plant of family Melanthaceae (also called cevadilla or sabadilla). Consequently, the substance was named sabadillic or cevadic acid. In 1865 it was found to be identical with B. F. Duppa and Edward Frankland's methyl-crotonic acid. In 1870 Geuther and Fröhlich prepared an acid from croton oil to which they gave the name tiglic acid (or tiglinic acid) after Croton tiglium (Linn.), specific name of the croton oil plant. The compound was shown to be identical with the previously described methyl-crotonic acid.

See also Tiglyl-CoA, a thioester with coenzyme A Duboisia myoporoides produces an alkaloid known as tigloidine.

References

Illustrations

Worked examples

Example 1 — a first encounter with Tiglic acid

Start with the simplest possible case. Write down what Tiglic acid 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 Tiglic acid 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 Tiglic acid 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 Tiglic acid

In research: Tiglic acid 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 Tiglic acid 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: Tiglic acid is common in secondary-school and first-year university syllabi. It links to neighbouring topics Alkenoic acids, Hemiterpenes, so understanding it makes those chapters shorter.
In everyday life: Look for Tiglic acid 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 Tiglic acid in 20 minutes

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

Frequently asked questions

What is Tiglic acid in simple terms?

Tiglic acid is a monocarboxylic unsaturated organic acid. It is found in croton oil and in several other natural products.

Why does Tiglic acid 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 Tiglic acid?

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 Tiglic acid.