Organic Compounds Containing Oxygen
Topics
- Alcohols: identification of 1/2/3 alcohols, dehydration mechanism
- Phenols: acidity, electrophilic substitution, Reimer-Tiemann
- Ethers
- Carbonyl group and nucleophilic addition, relative reactivity
- Aldehydes and ketones: HCN, NH3 derivatives, Grignard, oxidation, reduction (Wolff-Kishner, Clemmensen)
- Alpha-hydrogen acidity, aldol, Cannizzaro, haloform
- Tests to distinguish aldehydes and ketones
- Carboxylic acids: acidic strength
Chapter tests
See all →Top questions
See all →- Identify the suitable reagent for the following conversion.Methyl benzoate (Ph-COOCH3) → benzaldehyde (Ph-CHO) Answer: 2. (i) AlH(iBu)₂ (ii) H₂O Key idea: partial reduction of an ester to an aldehyde needs DIBAL-H at low temperature. AlH(i-Bu)₂ follow... 1
- The major product of the following reaction is :Reactant: Ph-CO-CH2CH2-CN; (i) CH_3MgBr (excess); (ii) H_3O^+ Answer: 2. structure (2) Key idea: Grignard reagent adds to both the ketone and the nitrile, but the nitrile adduct is hydrolysed to a keton... 1
- The correct order of decreasing acidity of the following aliphatic acids is : Answer: 3. HCOOH > CH₃COOH > (CH₃)₂CHCOOH > (CH₃)₃CCOOH Key idea: alkyl groups are electron-donating (+I) and destabilise the carboxylate io... 1
- Which one of the following alcohols reacts instantaneously with Lucas reagent? Answer: 1. CH₃-C(CH₃)(CH₃)-OH (i.e. (CH₃)₃C-OH , drawn with CH₃ above and below the carbon) Key idea: Lucas reagent ( ZnCl₂ /conc. HCl) work... 1
- Major products A and B formed in the following reaction sequence, are[scheme: 2-methylcyclohexanol (OH and H_3C on adjacent ring carbons) PBr_3 A (major) [Δ]alc.\ KOH B (major), see figure] Answer: 2. A = [structure: 1-bromo-2-methylcyclohexane], B = [structure: 1-methylcyclohexene (double bond adjacent to methyl carbon)] Key id... 1
- Match List I with List II.List I (Reactions): A. [structure: bicyclohexylidene → 2 cyclohexanone] B. [structure: benzene → benzophenone] C. [structure: cyclohexanol → cyclohexanone] D. [structure: ethylbenzene → potassium benzoate]List II (Reagents/C… Answer: 4. A-IV, B-I, C-II, D-III Key idea: identify the reagent for each conversion. A: alkene to two ketones is ozonolysis, O₃ , then Zn-H... 1