What is the organic product of the following electrocyclic reaction?
A)I
B)II
C)III
D)IV

Question

What is the organic product of the following electrocyclic reaction? 
A)I 
B)II 
C)III 
D)IV

Quizplus · Accepted Answer

The given reaction is a thermal electrocyclic ring opening reaction of cyclobutene. The initial cyclobutene has 4 pi electrons and the product must also have 4 pi electrons. Option I is not correct as it has only 2 pi electrons. Option III is not correct as it has 6 pi electrons. Option IV is not correct as it is not an electrocyclic reaction. Option II has 4 pi electrons and is therefore the correct organic product.

What Is the Organic Product of the Following Electrocyclic Reaction