chemistry

Nitridoborate

Nitridoborate 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 Nitridoborate rather than just read about it. In short: The nitridoborates are chemical compounds of boron and nitrogen with metals. These compounds are typically produced at high temperature by reacting hexagonal boron nitride (α -BN) with metal nitrides or by metathesis reactions involving nitridoborates.

Key takeaways

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

Reference excerpt

The nitridoborates are chemical compounds of boron and nitrogen with metals. These compounds are typically produced at high temperature by reacting hexagonal boron nitride (α -BN) with metal nitrides or by metathesis reactions involving nitridoborates. A wide range of these compounds have been made involving lithium, alkaline earth metals and lanthanides, and their structures determined using crystallographic techniques such as X-ray crystallography. Structurally one of their interesting features is the presence of polyatomic anions of boron and nitrogen where the geometry and the B–N bond length have been interpreted in terms of π-bonding. Many of the compounds produced can be described as ternary compounds of metal boron and nitrogen and examples of these are Li3BN2, Mg3BN3, La3B3N6, La5B4N9. However, there are examples of compounds with more than one metal, for example La3Ni2B2N3 and compounds containing anions such as Cl−, for example Mg2BN2Cl.

Structures and bonding Examination of the crystallographic data shows the presence of polyatomic units consisting of boron and nitrogen. These units have structures similar to those of isoelectronic anions, which have π-bonded structures. The bonding in some of these compounds is ionic in character, such as Ca3[BN2]2, other compounds have metallic characteristics, where the bonding has been described in terms of π-bonded anions with extra electrons in anti-bonding orbitals that not only cause a lengthening of the B–N bonds but also form part of the conduction band of the solid. The simplest ion BNn− is comparable to the C2−2 ion, but attempts to prepare the compound CaBN analogous to CaC2 calcium carbide failed. The bonding of compounds containing the diatomic BN anion have been explained in terms of electrons entering anti-bonding orbitals and reducing the B–N bond order from 3 (triple bond) in BN2− to 2 (double bond) in BN4−. Some nitridoborates are salt-like such as Li3BN2, LiCa4[BN2]3 others have a metallic lustre, such as LiEu4[BN2]3. Bonding calculations show that the energy of the valence orbitals of metal atoms of group 2 and lanthanide elements are higher than those of the bonding orbitals in BNx ions which indicates an ionic like interaction between a metal atom and a BNx ion. With lanthanide compounds where extra electrons enter the anti-bonding orbitals of an ion there can be a smaller band gap giving the compounds metal like properties such as lustre. With transition metals the d orbitals can be similar in energy to bonding orbitals in the BN anions suggesting covalent interactions.

For comparison purposes the following are considered to be typical BN bond lengths

References

Worked examples

Example 1 — a first encounter with Nitridoborate

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

In research: Nitridoborate 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 Nitridoborate 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: Nitridoborate is common in secondary-school and first-year university syllabi. It links to neighbouring topics Anions, Boron–nitrogen compounds, so understanding it makes those chapters shorter.
In everyday life: Look for Nitridoborate 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 Nitridoborate in 20 minutes

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

Frequently asked questions

What is Nitridoborate in simple terms?

Why does Nitridoborate 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 Nitridoborate?

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 Nitridoborate.