chemistry

Oximide

Oximide 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 Oximide rather than just read about it. In short: Oximide is an unstable chemical compound, the cyclic imide of oxalic acid. Other names for this are the systematic name 2,3-Aziridinedione or oxalimide.

Key takeaways

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

Reference excerpt

Oximide is an unstable chemical compound, the cyclic imide of oxalic acid. Other names for this are the systematic name 2,3-Aziridinedione or oxalimide. The chemical formula is C2HNO2. Its core is a three member heterocycle, aziridine.

Production In 1886 Ost and Mente claimed to produce oximide by the reaction of oxamic acid with phosphorus pentachloride (PCl5). However, a product with a six member ring, tetraketopiperazine, may have been produced instead. Later attempts to reproduce the production of oximide by this method were a failure. The first successful manufacture of oximide was by Hiromu Aoyama, Masami Sakamoto, and Yoshimori Omote in 1980.

Properties Aziridine-2,3-dione has an infrared absorption band at 1954 cm−1.

Related The term "oximide" has also been used for oximes. Derivatives of oximide exist where the hydrogen atom is substituted by other organic groups such as methyl or phenyl. When 4-methyl-1,2,4-triazolinedione is irradiated by ultraviolet light with wavelength 335 nm in a noble gas matrix, some methylaziridine-2,3-dione is made (along with isocyanates, carbon monoxide and dinitrogen). Similarly 4-phenyl-1,2,4-triazolinedione irradiated by ultraviolet light with wavelength 310 nm makes some phenylaziridine-2,3-dione. Shorter wavelength ultraviolet light decomposes these compounds to isocyanates (-NCO). Another method to produce oximide derivatives is by the photolysis of substituted diphenylmaleylimide ozonide at liquid nitrogen temperature (77K) in a potassium bromide matrix. Derivatives made this way are methyl, isopropyl and phenylethyl-aziridine-2,3-dione. These compounds are unstable at higher temperatures, and when heated, decompose to carbon monoxide and isocyanates.

References

Worked examples

Example 1 — a first encounter with Oximide

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

In research: Oximide 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 Oximide 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: Oximide is common in secondary-school and first-year university syllabi. It links to neighbouring topics Diketones, Heterocyclic compounds with 1 ring, Imides, so understanding it makes those chapters shorter.
In everyday life: Look for Oximide 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 Oximide in 20 minutes

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

Frequently asked questions

What is Oximide in simple terms?

Oximide is an unstable chemical compound, the cyclic imide of oxalic acid. Other names for this are the systematic name 2,3-Aziridinedione or oxalimide.

Why does Oximide 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 Oximide?

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 Oximide.