Home › JEE Advanced › Chemistry › Aldehydes, Ketones and Carboxylic Acids › Nucleophilic addition to carbonyl: nucleophile a…
Nucleophilic addition to carbonyl: nucleophile attacks:
AO
BC of C=O (electrophilic due to polarized C=O bond)
CH
DAnywhere
Answer & Solution
Correct answer: B. C of C=O (electrophilic due to polarized C=O bond)
C=O is polarized: C^(δ+) and O^(δ-). Nucleophile (CN⁻, RMgX, H⁻ from NaBH₄) attacks electrophilic C. Tetrahedral intermediate formed, then protonated at O to give alcohol/cyanohydrin.
Related questions
Against ketones, aldehydes in nucleophilic addition are:Aldehydes and ketones take part in addition that is:Solubility of aldehydes falls as the alkyl chain grows:Methanal, ethanal and propanone mix with water in:Aldehydes boil lower than alcohols of like mass because they lack:Aldehydes boil higher than hydrocarbons of like mass because of:At room temperature methanal exists as a:The carbonyl carbon behaves as a centre that is: