Alcohols & Ethers - Complete Interactive Lesson

Part 1: Alcohol Nomenclature & Properties

⚗️ Alcohols Ethers

Part 1 of 7 — Alcohol Nomenclature & Properties

1. Alcohols

R-OH; named with -ol suffix

2. Classification

primary (1°), secondary (2°), tertiary (3°)

3. Hydrogen bonding → higher boiling points than alkanes

Hydrogen bonding → higher boiling points than alkanes

4. Acidity

pKa ~16-18 (weaker than water, stronger than alkanes)

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Key Concepts Summary

Alcohols: R-OH; named with -ol suffix
Classification: primary (1°), secondary (2°), tertiary (3°)
Hydrogen bonding → higher boiling points than alkanes
Acidity: pKa ~16-18 (weaker than water, stronger than alkanes)

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Part 2: Alcohol Synthesis

Alcohol Synthesis

Part 2 of 7 — Alcohol Synthesis

1. Grignard reaction

RMgBr + carbonyl → alcohol

2. Hydration of alkenes

Markovnikov (H₃O⁺) or anti-Markovnikov (BH₃)

3. Reduction of carbonyls

NaBH₄ or LiAlH₄

4. Hydrolysis of esters gives alcohols

Hydrolysis of esters gives alcohols

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Key Concepts Summary

Grignard reaction: RMgBr + carbonyl → alcohol
Hydration of alkenes: Markovnikov (H₃O⁺) or anti-Markovnikov (BH₃)
Reduction of carbonyls: NaBH₄ or LiAlH₄
Hydrolysis of esters gives alcohols

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Part 3: Alcohol Reactions

Alcohol Reactions

Part 3 of 7 — Alcohol Reactions

<div class="my-8 rounded-2xl border border-amber-200/80 dark:border-amber-700/60 bg-gradient-to-br from-amber-50 via-white to-orange-50 dark:from-amber-950/30 dark:via-gray-900 dark:to-orange-950/30 p-6 shadow-lg"> <p class="m-0 text-base md:text-lg font-semibold text-amber-900 dark:text-amber-100"> Quick frame: alcohol reactivity is mostly about elimination, oxidation, and functional-group conversion pathways. </p> </div> <div class="grid grid-cols-1 md:grid-cols-2 gap-5 my-8"> <div class="rounded-2xl border border-orange-200 dark:border-orange-700/60 bg-gradient-to-br from-orange-50 to-amber-50 dark:from-orange-950/30 dark:to-amber-950/30 p-5 shadow-md"> <h3 class="mt-0 mb-2 text-xl font-extrabold text-orange-900 dark:text-orange-100">1) Dehydration</h3> <p class="mb-3 text-orange-900/90 dark:text-orange-100/90">Strong acid + heat promotes elimination to form alkenes.</p> <ul class="my-0 space-y-1.5 text-orange-900 dark:text-orange-100"> <li><code>H₂SO₄ / heat → alkene</code></li> <li>E1 is favored for 3° substrates</li> <li>E2 is favored for 1° substrates</li> </ul> </div> <div class="rounded-2xl border border-blue-200 dark:border-blue-700/60 bg-gradient-to-br from-blue-50 to-cyan-50 dark:from-blue-950/30 dark:to-cyan-950/30 p-5 shadow-md"> <h3 class="mt-0 mb-2 text-xl font-extrabold text-blue-900 dark:text-blue-100">2) Oxidation</h3> <p class="mb-3 text-blue-900/90 dark:text-blue-100/90">Oxidants determine how far oxidation proceeds for primary alcohols.</p> <ul class="my-0 space-y-1.5 text-blue-900 dark:text-blue-100"> <li><code>PCC: 1° → aldehyde</code></li> <li><code>Jones / CrO₃: 1° → carboxylic acid</code></li> <li><code>Jones / CrO₃: 2° → ketone</code></li> </ul> </div> <div class="rounded-2xl border border-violet-200 dark:border-violet-700/60 bg-gradient-to-br from-violet-50 to-fuchsia-50 dark:from-violet-950/30 dark:to-fuchsia-950/30 p-5 shadow-md"> <h3 class="mt-0 mb-2 text-xl font-extrabold text-violet-900 dark:text-violet-100">3) Conversion to Alkyl Halides</h3> <p class="mb-3 text-violet-900/90 dark:text-violet-100/90">Alcohols can be transformed into better leaving-group products (alkyl halides).</p> <ul class="my-0 space-y-1.5 text-violet-900 dark:text-violet-100"> <li><code>HX</code></li> <li><code>PBr₃</code></li> <li><code>SOCl₂</code></li> </ul> </div> <div class="rounded-2xl border border-rose-200 dark:border-rose-700/60 bg-gradient-to-br from-rose-50 to-red-50 dark:from-rose-950/30 dark:to-red-950/30 p-5 shadow-md"> <h3 class="mt-0 mb-2 text-xl font-extrabold text-rose-900 dark:text-rose-100">4) 3° Alcohol Limitation</h3> <p class="mb-0 text-rose-900 dark:text-rose-100">3° alcohols cannot be oxidized under typical oxidation conditions because they lack the required C-H bond at the carbon bearing OH.</p> </div> </div>

Part 4: Ether Nomenclature & Synthesis

Ether Nomenclature & Synthesis

Part 4 of 7 — Ether Nomenclature & Synthesis

1. Ethers

R-O-R; named as alkoxy + alkane

2. Williamson ether synthesis

alkoxide + primary alkyl halide (SN2)

3. Ethers are relatively unreactive (good solvents)

Ethers are relatively unreactive (good solvents)

4. Crown ethers

cyclic ethers that complex cations

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Key Concepts Summary

Ethers: R-O-R; named as alkoxy + alkane
Williamson ether synthesis: alkoxide + primary alkyl halide (SN2)
Ethers are relatively unreactive (good solvents)
Crown ethers: cyclic ethers that complex cations

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Part 5: Ether Reactions

Ether Reactions

Part 5 of 7 — Ether Reactions

1. Acid-catalyzed cleavage

HI or HBr cleaves ethers

2. Epoxides

strained three-membered ring ethers

3. Epoxide ring-opening

nucleophilic attack at less substituted carbon (base) or more substituted (acid)

4. Epoxides are much more reactive than simple ethers

Epoxides are much more reactive than simple ethers

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Key Concepts Summary

Acid-catalyzed cleavage: HI or HBr cleaves ethers
Epoxides: strained three-membered ring ethers
Epoxide ring-opening: nucleophilic attack at less substituted carbon (base) or more substituted (acid)
Epoxides are much more reactive than simple ethers

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Part 6: Problem-Solving Workshop

Problem-Solving Workshop

Part 6 of 7 — Problem-Solving Workshop

1. Predicting alcohol oxidation products

Predicting alcohol oxidation products

2. Designing Grignard synthesis strategies

Designing Grignard synthesis strategies

3. Comparing alcohol reaction pathways

Comparing alcohol reaction pathways

4. Analyzing epoxide ring-opening regiochemistry

Analyzing epoxide ring-opening regiochemistry

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Key Concepts Summary

Predicting alcohol oxidation products
Designing Grignard synthesis strategies
Comparing alcohol reaction pathways
Analyzing epoxide ring-opening regiochemistry

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Part 7: Synthesis & Review

Synthesis & Review

Part 7 of 7 — Synthesis & Review

1. Alcohols are versatile functional groups

Alcohols are versatile functional groups

2. Oxidation state changes determine product

Oxidation state changes determine product

3. Ethers as solvents and protecting groups

Ethers as solvents and protecting groups

4. Review

alcohol and ether transformations

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Key Concepts Summary

Alcohols are versatile functional groups
Oxidation state changes determine product
Ethers as solvents and protecting groups
Review: alcohol and ether transformations

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