MolSynapsequestion bank

MolSynapse / Question bank / Organic Reaction Mechanisms I: Nucleophiles and Carbonyl Addition / Nucleophilic addition to aldehydes and ketones

NEET levelSingle correct optionDifficulty 1 of 3o1060

The reagent that converts $R X_{2} C = O$ into $R X_{2} CH X_{2}$ under strongly basic conditions is

A $Zn - Hg$ with conc. HCl
B $NaBH X_{4}$ in ethanol
C $LiAlH X_{4}$ in ether
D $NH X_{2} NH X_{2}$ with KOH in ethylene glycol, heat

Answer: D

Wolff-Kishner reduction (hydrazine, KOH, high-boiling glycol, heat) converts a carbonyl group to a methylene group in basic medium. Zn-Hg/HCl (Clemmensen) is acidic, while

LiAlH X_{4}

and

NaBH X_{4}

stop at the alcohol.

Practice Organic Reaction Mechanisms I: Nucleophiles and Carbonyl Addition More on Nucleophilic addition to aldehydes and ketones

Previous questionNext question

More questions on Nucleophilic addition to aldehydes and ketones