Multiple choice

Which of the following reactions are involved in the formation of carbenes as reaction intermediates?

  1. Carbylamines reaction
  2. Reimer-Tiemann reaction
  3. Wolff rearrangement
  4. Lossen rearrangement

  1. 1 and 2

  2. 2 and 3

  3. 3 and 4

  4. 1, 2 and 3

  5. 2, 3 and 4
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A reaction intermediate is a molecular entity that is formed from the reactants and reagents to give products of a chemical reaction. Carbenes are highly reactive species having a very short life time (<1 sec) with two unshared electrons. The reactions involved in the formation of carbenes are Carbylamines reaction, Reimer-Tiemann reaction, Wolff rearrangement etc. In Lossen rearrangement, the reactive intermediate is a nitrene with two unshared pair of electrons.

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