Concept explainers
(a)
Interpretation:
The explanation as to why
Concept introduction:
(b)
Interpretation:
The explanation as to why
Concept introduction:
In keto-enol tautomerism, the keto-enol forms of a compound are present in equilibrium with each other. Keto and enol forms both are tautomers of each other, they are inter-convertible to each other by the transfer of
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Organic Chemistry
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- Rank the compounds in each group according to their reactivity towardelectrophilic substitution.(a) Chlorobenzene, o-dichlorobenzene, benzene(b) p-Bromonitrobenzene , nitrobenzene, phenol(c) Fluorobenzene, benzaldehyde, a-xylene(d) Benzonitrile, p-methylbenzonitr ile,p-methoxybenzonitrilearrow_forwardAnswer BOTH parts of this question. (a) Briefly explain the origin of amine basicity. Using resonance structures explain why aniline is a weaker base than methylamine. (b) Draw the structure of compound X and provide a curly arrow mechanism for the reduction in Scheme 1. X 1. NaBH4 2. H₂O Scheme 1 OHarrow_forwardHow would you account for the following :(a) Electrophilic susbstitution in case of aromatic amines takes place more readily than benzene.(b) Ethanamide is a weaker base than ethanamine.arrow_forward
- (a) Which of the following phenols is the least acidic? (b) Which of the following phenols is the most acidic?arrow_forwardDescribe the characteristic infrared absorption frequencies that would allow you to distinguish between the following pairs of compounds. (a) cyclohex-2-enone and cyclohex-3-enone (b) cyclohexanol and cyclohexanonearrow_forwardGive reasons :(a) n-Butyl bromide has higher boiling point than f-butyl bromide.(b) Racemic mixture is optically inactive.(c) The presence of nitro group (-NO2) at o/p positions increases the reactivity of haloarenes towards nucleophilic substitution reactions.arrow_forward
- - Rank the following substances in order of increasing acidity: (a) Phenol, p-methylphenol, p-(trifluoromethyl)phenol (b) Benzyl alcohol, phenol, p-hydroxybenzoic acidarrow_forward(a) Account for the following :(i) Propanal is more reactive than propanone towards nucleophilic reagents.(ii) Electrophilic substitution in benzoic acid takes place at meta position.(iii) Carboxylic acids do not give characteristic reactions of carbonyl group.(b) Give simple chemical test to distinguish between the following pairs of compounds:(i) Acetophenone and benzaldehyde(ii) Benzoic acid and ethylbenzoate.arrow_forwardLinalool and lavandulol are two of the major components of lavender oil. (a) What organolithium reagent and carbonyl compound can be used to make each alcohol? (b) How might lavandulol be formed by reduction of a carbonyl compound? (c) Why can't linalool be prepared by a similar pathway?arrow_forward
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