Q83 · CSIR-NET Chemistry, December 2013
Paper: CSIR-NET December 2013 · Subject: Organic Chemistry · Chapter: Pericyclic Reactions · Topic: Electrocyclic · Marks: 2 · Difficulty: Medium
The number of $\pi$ electrons participating and the pericyclic mode in the following reaction are 
(a)4 and conrotatory
(b)4 and disrotatory
(c)6 and conrotatory
(d)6 and disrotatory
Answer
Answer: D ✓ checked by 4AB · confidence high
Explanation
Hexatriene → cyclohexadiene is a 6π-electron thermal electrocyclisation, which is disrotatory (4n + 2).
Study loop for Pericyclic Reactions