MolSynapse / Question bank / General Organic Chemistry III: Reaction Intermediates

General Organic Chemistry III: Reaction Intermediates

275 questions in 10 topics. 55 NEET level, 110 JEE Main, 110 JEE Advanced. Every question was written for this chapter and solved independently a second time before publication.

Practice this chapter Chapter guide

Carbocations: formation, stability, rearrangements 55

Carbanions and enolates 28

Carbenes and nitrenes 27

How many electrons are present in the valence shell of the carbon atom of a carbene such as :CH2?
In singlet methylene, :CH2, the carbon atom is best described as
Dichlorocarbene, :CCl2, is conveniently generated in the laboratory by treating
In the Reimer-Tiemann reaction (phenol, CHCl3, aqueous NaOH, then acid), the electrophile that attacks the phe...
A nitrene, R-N:, is best described as
cis-But-2-ene is treated with CH2I2 and a zinc-copper couple in ether (Simmons-Smith reaction). The product is
trans-But-2-ene reacts with singlet dichlorocarbene (from CHCl3 and t-BuOK). Which statement describes the pro...
Pyrrole is heated with chloroform and sodium ethoxide (Ciamician-Dennstedt rearrangement). The main product is
All 27 questions on this topic

General Organic Chemistry III: Reaction Intermediates

Carbocations: formation, stability, rearrangements 55

Carbanions and enolates 28

Carbenes and nitrenes 27

Free radicals 28

Hammond postulate and reactivity-selectivity 27

Reaction energy profiles, kinetic vs thermodynamic control 55

Carbocation rearrangements from drawn cations 14

Stability ranking of drawn radicals, carbanions and carbenes 14

Kinetic vs thermodynamic enolate site on drawn ketones 14

Alpha hydrogens and enolisable positions in drawn compounds 13