chemistry

Lithium imide

Lithium imide 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 Lithium imide rather than just read about it. In short: Lithium imide is an inorganic compound with the chemical formula Li2NH. This white solid can be formed by a reaction between lithium amide and lithium hydride.

Key takeaways

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

Reference excerpt

Lithium imide is an inorganic compound with the chemical formula Li2NH. This white solid can be formed by a reaction between lithium amide and lithium hydride.

LiNH2 + LiH → Li2NH + H2 The product is light-sensitive and can undergo disproportionation to lithium amide and characteristically red lithium nitride.

2 Li2NH → LiNH2 + Li3N Lithium imide is thought to have a simple face-centered cubic structure with a Fm3m space group; with N-H bond distances of 0.82(6) Å and a H–N–H bond angle of 109.5°, giving it a similar structure to lithium amide. Lithium imide is strongly basic and deprotonates even some extremely weak acids such as methane and ammonia, due to the very localized negative charge on the nitrogen, which carries two formal charges. It has uses in organic and organometallic chemistry. It has been investigated as a material for hydrogen storage.

References

Illustrations

Worked examples

Example 1 — a first encounter with Lithium imide

Start with the simplest possible case. Write down what Lithium imide 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 Lithium imide 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 Lithium imide 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 Lithium imide

In research: Lithium imide 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 Lithium imide 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: Lithium imide is common in secondary-school and first-year university syllabi. It links to neighbouring topics Hydrogen compounds, Inorganic compound stubs, Inorganic imides, so understanding it makes those chapters shorter.
In everyday life: Look for Lithium imide 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 Lithium imide in 20 minutes

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

Frequently asked questions

What is Lithium imide in simple terms?

Lithium imide is an inorganic compound with the chemical formula Li2NH. This white solid can be formed by a reaction between lithium amide and lithium hydride.

Why does Lithium imide 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 Lithium imide?

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 Lithium imide.