science

Hexaperchloratoaluminate

Hexaperchloratoaluminate is a science 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 Hexaperchloratoaluminate rather than just read about it. In short: Hexaperchloratoaluminate is a polyatomic anion with the chemical formula [Al(ClO4)6]3−. It is composed of six perchlorate groups (−ClO4 or more precisely −O−Cl(=O)3) covalently bound to the central aluminium atom, resulting in the anion with net charge of –3.

Key takeaways

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

Reference excerpt

Hexaperchloratoaluminate is a polyatomic anion with the chemical formula [Al(ClO4)6]3−. It is composed of six perchlorate groups (−ClO4 or more precisely −O−Cl(=O)3) covalently bound to the central aluminium atom, resulting in the anion with net charge of –3. The six perchlorate groups are ligands of the central aluminium. This anion is a highly oxidizing and reactive complex, similar to other hexacoordinated aluminium complexes such as hexanitratoaluminate. The aluminium perchlorate salts formed with hexaperchloratoaluminate are of particular interest due to their potential uses as energetic materials. The series of hexaperchloratoaluminate salts includes lithium hexaperchloratoaluminate, ammonium hexaperchloratoaluminate, tetramethylammonium hexaperchloratoaluminate, and trinitronium hexaperchloratoaluminate. Each of these compounds possess unique properties and may have potential applications in areas such as rocket propellants, pyrotechnics, and other explosive-based technologies.

Preparation Hexaperchloratoaluminates can be synthesized by combining aluminum trichloride and various perchlorates in liquid sulfur dioxide at a temperature of –10°C:

3 [NO2]ClO4 + 3 LiClO4 + AlCl3 → 3 NO2Cl + Li3[Al(ClO4)6], 3 [NO2]ClO4 + 3 [NH4]ClO4 + AlCl3 → 3 NO2Cl + [NH4]3[Al(ClO4)6], 6 [NO2]ClO4 + AlCl3 → 3 NO2Cl + [NO2]3[Al(ClO4)6]. To form hexaperchloratoaluminates, one can heat aluminium nitrate in the presence of nitrosonium or nitronium perchlorate at a temperature of 125 °C:

10–14 [NO]ClO4 + Al(NO3)3 → [NO2]3[Al(ClO4)6] + gaseous products, 6–10 [NO2]ClO4 + Al(NO3)3 → [NO2]3[Al(ClO4)6] + gaseous products, 3 [NO2]ClO4 + 3 KClO4 + AlCl3 → 3 NO2Cl + K3[Al(ClO4)6]. Obtaining hydrazinium hexaperchloratoaluminate in a highly pure form is problematic. According to the available studies, this compound can only be produced via a low-yielding synthesis route including the reaction of aluminium chloride, hydrazinium perchlorate, and nitronium perchlorate:

3 [NO2]ClO4 + 3 [N2H5]ClO4 + AlCl3 → 3 NO2Cl + [N2H5]3[Al(ClO4)6]. Guanidinium hexaperchloratoaluminate can be synthesized via the following reaction:

3 [NO2]ClO4 + 3 [C(NH2)3]ClO4 + AlCl3 → 3 NO2Cl + [C(NH2)3]3[Al(ClO4)6].

References

Worked examples

Example 1 — a first encounter with Hexaperchloratoaluminate

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

In research: Hexaperchloratoaluminate appears in science 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 Hexaperchloratoaluminate 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: Hexaperchloratoaluminate is common in secondary-school and first-year university syllabi. It links to neighbouring topics Aluminium complexes, Anions, Perchlorates, so understanding it makes those chapters shorter.
In everyday life: Look for Hexaperchloratoaluminate 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 Hexaperchloratoaluminate in 20 minutes

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

Frequently asked questions

What is Hexaperchloratoaluminate in simple terms?

Why does Hexaperchloratoaluminate matter?

Because it connects several science 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 Hexaperchloratoaluminate?

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 Hexaperchloratoaluminate.