Test: Electrophiles and Nucleophiles - Chemistry MCQ

Because electrophiles accept electrons, they are Lewis acids not Lewis base, according to Acid-Base reaction theories.

In polar, aprotic solvents, I^– the weakest and this is reversed in polar, protic solvents.

A bromo-carbenium ion intermediate may be predominant instead of vicinyl dibromide if the alkene has a cation-stabilizing substituent like phenyl group. There is an example of the isolation of the bromonium ion.

Sodium acetate will do partial enolization of 1, 3-Dicarbonyl compound. Weak base like NaOH and Et-O^– will form an alcohol and LDA will do complete enolization.

The ammonium ion cannot react at the N with a nucleophile because the N already has an octet of electrons.

First product will be formed by cross aldol where nucleophile (^–OH) will attack at different type or reactant molecule.

Second type of product will be formed aldol condensation where reaction will occur between same type of molecule.

An electrophile is a species that accepts an electron pair. In the given options:

H₂O (water) is not an electrophile because it is a nucleophile, meaning it donates an electron pair.

Nucleophile (-OH) will attack at carbon adjacent to carbonyl bond and form the below product.

-CH₃O is a +M group, so it has lone pair to donate to upcoming electrophile.