chemistry

Sodium phenoxide

Sodium phenoxide 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 Sodium phenoxide rather than just read about it. In short: Sodium phenoxide (sodium phenolate) is an organic compound with the formula NaOC6H5. It is a white crystalline solid.

Key takeaways

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

Reference excerpt

Sodium phenoxide (sodium phenolate) is an organic compound with the formula NaOC6H5. It is a white crystalline solid. Its anion, phenoxide, also known as phenolate, is the conjugate base of phenol. It is used as a precursor to many other organic compounds, such as aryl ethers.

Synthesis and structure Most commonly, solutions of sodium phenoxide are produced by treating phenol with sodium hydroxide. Anhydrous derivatives can be prepared by combining phenol and sodium. A related, updated procedure uses sodium methoxide instead of sodium hydroxide:

NaOCH3 + HOC6H5 → NaOC6H5 + HOCH3 Sodium phenoxide can also be produced by the "alkaline fusion" of benzenesulfonic acid, whereby the sulfonate groups are displaced by hydroxide:

C6H5SO3Na + 2 NaOH → C6H5OH + Na2SO3 This route once was the principal industrial route to phenol.

Structure Like other sodium alkoxides, solid sodium phenoxide adopts a complex structure involving multiple Na-O bonds. Solvent-free material is polymeric, each Na center being bound to three oxygen ligands as well as the phenyl ring. Adducts of sodium phenoxide are molecular, such as the cubane-type cluster [NaOPh]4(HMPA)4.

Reactions Sodium phenoxide is a moderately strong base. Acidification gives phenol:

C6H5OH ⇌ C6H5O− + H+ (K = 10−10) The acid-base behavior is complicated by homoassociation, reflecting the association of phenol and phenoxide. Sodium phenoxide reacts with alkylating agents to afford alkyl phenyl ethers:

NaOC6H5 + RBr → ROC6H5 + NaBr The conversion is an extension of the Williamson ether synthesis. With acylating agents, one obtains phenyl esters:

NaOC6H5 + RC(O)Cl → RCO2C6H5 + NaCl Sodium phenoxide is susceptible to certain types of electrophilic aromatic substitutions. For example, it reacts with carbon dioxide to form 2-hydroxybenzoate, the conjugate base of salicylic acid. In general however, electrophiles irreversibly attack the oxygen center in phenoxide.

References

External links Media related to Sodium phenoxide at Wikimedia Commons

Illustrations

Worked examples

Example 1 — a first encounter with Sodium phenoxide

Start with the simplest possible case. Write down what Sodium phenoxide 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 Sodium phenoxide 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 Sodium phenoxide 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 Sodium phenoxide

In research: Sodium phenoxide 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 Sodium phenoxide 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: Sodium phenoxide is common in secondary-school and first-year university syllabi. It links to neighbouring topics Organic sodium salts, Phenolates, so understanding it makes those chapters shorter.
In everyday life: Look for Sodium phenoxide 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.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Sodium phenoxide” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Sodium phenoxide in 20 minutes

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

Frequently asked questions

What is Sodium phenoxide in simple terms?

Sodium phenoxide (sodium phenolate) is an organic compound with the formula NaOC6H5. It is a white crystalline solid.

Why does Sodium phenoxide 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 Sodium phenoxide?

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 Sodium phenoxide.