chemistry

Ruthenium(III) acetylacetonate

Ruthenium(III) acetylacetonate 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 Ruthenium(III) acetylacetonate rather than just read about it. In short: Ruthenium(III) acetylacetonate is a coordination complex with the formula Ru(O2C5H7)3. O2C5H7− is the ligand called acetylacetonate.

Key takeaways

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

Reference excerpt

Ruthenium(III) acetylacetonate is a coordination complex with the formula Ru(O2C5H7)3. O2C5H7− is the ligand called acetylacetonate. This compound exists as a dark red solid that is soluble in most organic solvents. It is used as a precursor to other compounds of ruthenium.

Structure and properties This compound has idealized D3 symmetry. Six oxygen atoms surround the central ruthenium atom in an octahedral arrangement. The average Ru-O bond length in Ru(acac)3 is 2.00 Å. Because Ru(acac)3 is low spin, there is one unpaired d electron, causing this compound to be paramagnetic. Ru(acac)3 has a magnetic susceptibility, χM, of 3.032×10−6 cm3/mol with an effective magnetic moment, μeff, of 1.66 μB. As a solution in dimethylformamide, the compound oxidizes at 0.593 and reduces at -1.223 V vs the ferrocene/ferrocenium couple. Reduction of Ru(acac)3 in the presence of alkenes affords the related diolefin complexes. Typically, such reactions are conducted with zinc amalgam in moist tetrahydrofuran:

2 Ru(acac)3 + 4 alkene + Zn → 2 Ru(acac)2(alkene)2 + Zn(acac)2 The resulting compounds are rare examples of metal-alkene complexes that reversibly sustain oxidation:

Ru(acac)2(alkene)2 ⇌ [Ru(acac)2(alkene)2]+ + e− The complex has been resolved into individual enantiomers by separation of its adduct with dibenzoyltartaric acid.

Preparation In 1914 tris(acetylacetonato)ruthenium(III) was first prepared by the reaction of ruthenium(III) chloride and acetylacetone in the presence of potassium bicarbonate. Since then, alternative synthetic routes have been examined, but the original procedure remains useful with minor variations:

RuCl3•3H2O + MeCOCH2COMe → Ru(acac)3 + 3 HCl + 3 H2O

References

Illustrations

Worked examples

Example 1 — a first encounter with Ruthenium(III) acetylacetonate

Start with the simplest possible case. Write down what Ruthenium(III) acetylacetonate 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 Ruthenium(III) acetylacetonate 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 Ruthenium(III) acetylacetonate 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 Ruthenium(III) acetylacetonate

In research: Ruthenium(III) acetylacetonate 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 Ruthenium(III) acetylacetonate 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: Ruthenium(III) acetylacetonate is common in secondary-school and first-year university syllabi. It links to neighbouring topics Acetylacetonate complexes, Ruthenium(III) compounds, Ruthenium complexes, so understanding it makes those chapters shorter.
In everyday life: Look for Ruthenium(III) acetylacetonate 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 Ruthenium(III) acetylacetonate in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Ruthenium(III) acetylacetonate 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.
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Frequently asked questions

What is Ruthenium(III) acetylacetonate in simple terms?

Ruthenium(III) acetylacetonate is a coordination complex with the formula Ru(O2C5H7)3. O2C5H7− is the ligand called acetylacetonate.

Why does Ruthenium(III) acetylacetonate 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 Ruthenium(III) acetylacetonate?

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 Ruthenium(III) acetylacetonate.