chemistry

Pentaamine(dinitrogen)ruthenium(II) chloride

Pentaamine(dinitrogen)ruthenium(II) chloride 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 Pentaamine(dinitrogen)ruthenium(II) chloride rather than just read about it. In short: Pentaamine(dinitrogen)ruthenium(II) chloride is an inorganic compound with the formula [Ru(NH3)5(N2)]Cl2. It is a nearly white solid, but its solutions are yellow.

Key takeaways

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

Reference excerpt

Pentaamine(dinitrogen)ruthenium(II) chloride is an inorganic compound with the formula [Ru(NH3)5(N2)]Cl2. It is a nearly white solid, but its solutions are yellow. The cationic complex is of historic significance as the first compound with N2 bound to a metal center. [Ru(NH3)5(N2)]2+ adopts an octahedral structure with C4v symmetry.

Preparation and properties Pentaamine(dinitrogen)ruthenium(II) chloride is synthesized in an aqueous solution from pentaamminechlororuthenium(III) chloride, sodium azide, and methanesulfonic acid:

[Ru(NH3)5Cl]Cl2 + NaN3 → [Ru(NH3)5N2]Cl2 + ... If it is to be used in situ, the cation can be made more conveniently from ruthenium(III) chloride and hydrazine hydrate:

RuCl3 + 4 N2H4 → [Ru(NH3)5N2]2+ + ... This N2 complex is stable in aqueous solution and has a relatively low ligand exchange rate with water. Being a d6 complex, the Ru-N bond is stabilized by the pi backbonding, the donation of metal d-electrons into the N2 π* orbitals. The related metal ammine complex [Os(NH3)5(N2)]2+ is also known.

Reactions The dinitrogen ligand is not reduced by aqueous sodium borohydride. Nearly all known reactions of this compound are displacement reactions. Pentaamine(halogen)ruthenium(II) halides can be synthesized by treating [Ru(NH3)5N2]2+ with halide sources:

[Ru(NH3)5N2]2+ + X− → [Ru(NH3)5X]+ + N2 [Ru(NH3)5N2]2+ forms the symmetrically bridging symmetrical dinitrogen complex [(NH3)5Ru-NN-Ru(NH3)5]4+.

References

Illustrations

Worked examples

Example 1 — a first encounter with Pentaamine(dinitrogen)ruthenium(II) chloride

Start with the simplest possible case. Write down what Pentaamine(dinitrogen)ruthenium(II) chloride 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 Pentaamine(dinitrogen)ruthenium(II) chloride 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 Pentaamine(dinitrogen)ruthenium(II) chloride 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 Pentaamine(dinitrogen)ruthenium(II) chloride

In research: Pentaamine(dinitrogen)ruthenium(II) chloride 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 Pentaamine(dinitrogen)ruthenium(II) chloride 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: Pentaamine(dinitrogen)ruthenium(II) chloride is common in secondary-school and first-year university syllabi. It links to neighbouring topics Ammine complexes, Chlorides, Dinitrogen complexes, so understanding it makes those chapters shorter.
In everyday life: Look for Pentaamine(dinitrogen)ruthenium(II) chloride 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 Pentaamine(dinitrogen)ruthenium(II) chloride in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Pentaamine(dinitrogen)ruthenium(II) chloride 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 Pentaamine(dinitrogen)ruthenium(II) chloride out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Pentaamine(dinitrogen)ruthenium(II) chloride in simple terms?

Pentaamine(dinitrogen)ruthenium(II) chloride is an inorganic compound with the formula [Ru(NH3)5(N2)]Cl2. It is a nearly white solid, but its solutions are yellow.

Why does Pentaamine(dinitrogen)ruthenium(II) chloride 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 Pentaamine(dinitrogen)ruthenium(II) chloride?

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 Pentaamine(dinitrogen)ruthenium(II) chloride.