chemistry

Tetranitratoborate

Tetranitratoborate 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 Tetranitratoborate rather than just read about it. In short: Tetranitratoborate is an anion composed of boron with four nitrate groups. It has formula [B(NO3)4]−.

Key takeaways

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

Reference excerpt

Tetranitratoborate is an anion composed of boron with four nitrate groups. It has formula [B(NO3)4]−. It can form salts with large cations such as tetramethylammonium nitratoborate, or tetraethylammonium tetranitratoborate. The ion was first discovered by C. R. Guibert and M. D. Marshall in 1966 after failed attempts to make neutral (non-ionic) boron nitrate, B(NO3)3, which has resisted attempts to make it; if it exists, it is unstable above −78 °C. Other related ions are the slightly more stable tetraperchloratoborates, with perchlorate groups instead of nitrate, and tetranitratoaluminate with the next atom down the periodic table, aluminium instead of boron ([Al(NO3)4]−).

Formation Tetramethylammonium chloride reacts with BCl3 to make [N(CH3)4]+[BCl4]−. Then the tetrachloroborate is reacted with N2O4 at around −20 °C to form tetramethylammonium nitratoborate, and other gases such as NO2Cl and Cl2. Another mechanism to make tetranitratoborate salts is to shake a metal nitrate with BCl3 in chloroform at 20 °C for several days. Trichloronitratoborate [BCl3(NO3)]− is an unstable intermediate.

M+NO−3 + BCl3 → M+[BCl3(NO3)]− 4 M+[BCl3(NO3)]− → 3 M+[BCl4]− + M+[B(NO3)4]−

Properties The infrared spectrum of tetramethylammonium nitratoborate includes a prominent line at 1,612 cm−1 with shoulders at 1582 and 1,626 cm−1 attributed to v4. Also prominent is 1,297 and 1,311 cm−1 attributed to v1, with these vibrations due to the nitrate bonded via one oxygen. The density of tetramethylammonium nitratoborate is 1.555 g·cm−3. It is colourless and crystalline. As tetramethylammonium nitratoborate is heated it has some sort of transition between 51 and 62 °C. It decomposes above 75 °C producing gas. Above 112 °C it is exothermic, and a solid is left if it is heated to 160 °C. Tetramethylammonium nitratoborate is insoluble in cold water but slightly soluble in hot water. It does not react with water. It also dissolves in liquid ammonia, acetonitrile, methanol, and dimethylformamide. It reacts with liquid sulfur dioxide. At room temperature tetramethylammonium nitratoborate is stable for months. It does not explode with impact. Alkali metal tetranitratoborates are unstable at room temperature and decompose. 1-Ethyl-3-methyl-imidazolimium tetranitratoborate was discovered in 2002. It is an ionic liquid that turns solid at −25 °C.

References

Illustrations

Worked examples

Example 1 — a first encounter with Tetranitratoborate

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

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

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

Frequently asked questions

What is Tetranitratoborate in simple terms?

Tetranitratoborate is an anion composed of boron with four nitrate groups. It has formula [B(NO3)4]−.

Why does Tetranitratoborate 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 Tetranitratoborate?

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 Tetranitratoborate.