chemistry

Tribromoethanol

Tribromoethanol 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 Tribromoethanol rather than just read about it. In short: 2,2,2-Tribromoethanol, often called just tribromoethanol, is a chemical compound with formula Br3C−CH2OH. Its molecule can be described as that of ethanol, with the three hydrogen atoms in position 2 (on the methyl group) replaced by bromine.

Key takeaways

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

Reference excerpt

2,2,2-Tribromoethanol, often called just tribromoethanol, is a chemical compound with formula Br3C−CH2OH. Its molecule can be described as that of ethanol, with the three hydrogen atoms in position 2 (on the methyl group) replaced by bromine. It is a white crystalline solid, soluble in water and other solvents, that absorbs strongly in the UV below 290 nm. Tribromoethanol is used in medicine and biology as an anesthetic, and has been available commercially for that purpose by the trade name Avertin. It was formerly used on humans and is still often used on laboratory animals, and to capture wild birds. It is also used in plastics industry as a polymerization initiator.

Uses

Animal anesthetic Tribromoethanol is often used to anesthetize laboratory animals, particularly rodents, before surgery. As a solution in tert-amyl alcohol, it has the brand name Avertin. The tert-amyl alcohol acts as a weak hypnotic, in addition to improving the solubility of the tribromoethanol. Administered intravenously, tribromoethanol (Avertin) causes rapid and deep anesthesia followed by rapid and full postoperative recovery in small mammals. Recently its safety for this purpose has been questioned.

Wildlife capture Tribromoethanol has also been long used as spiked grain bait to capture wild turkeys for research and wildlife management purposes. However, the birds learn to avoid it, for over a year, after a single exposure, and will drive other flock members away from the bait when they detect it.

Human anesthetic In the first half of the 20th century, Avertin was also used in humans as a general anesthetic or basal narcotic to induce unconsciousness prior to the administration of other anesthetic agents. It was administered rectally as a retention enema or by intravenous injection. Its rectal use was particularly favored for pediatrics, head or neck surgery, or in mentally unstable or anxious patients. Electrophysiology studies showed that tribromoethanol acts as a positive allosteric modulator of the inhibitory GABAA and glycine receptors, a mechanism similar to that seen with the related compound 2,2,2-trichloroethanol. Bromal hydrate (2,2,2-tribromoethanol-1,1-diol), a compound also recognized to produce general anesthesia in animals, is metabolized to tribromoethanol.

Polymerization initiator Tribromoethanol can be used as a functional polymerization initiator for the introduction of α-hydroxyl groups in poly(methyl methacrylate) (PMMA) and poly(n-butyl acrylate) (PBAK).

Chemistry

Photolysis Tribromoethanol should be kept refrigerated and in the dark, to prevent decomposition by light into hydrobromic acid and possibly 2,2-dibromoacetaldehyde or glycolic acid.

See also Trichloroethanol Trifluoroethanol

References

Illustrations

Worked examples

Example 1 — a first encounter with Tribromoethanol

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

In research: Tribromoethanol 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 Tribromoethanol 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: Tribromoethanol is common in secondary-school and first-year university syllabi. It links to neighbouring topics Anesthetics, Haloethanols, Tribromomethyl compounds, so understanding it makes those chapters shorter.
In everyday life: Look for Tribromoethanol 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 Tribromoethanol in 20 minutes

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

Frequently asked questions

What is Tribromoethanol in simple terms?

Why does Tribromoethanol 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 Tribromoethanol?

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 Tribromoethanol.