# What will be the product when 3,4-dibromocyclohexene is reacted with sodium followed by heating with selenium?

I'm tutoring few Class 12 students for their chemistry exams. I'm stuck with few problems. I don't know, if the key is wrong or I am wrong.

According to me product (A) must be the cyclic diene, as given in option (A). Now, I don't know, what happens when you heat cyclic diene with selenium. But I do know that, $\ce{SeO2}$ oxidizes allylic positions of alkenes into alcohols. But, none of the options given are fitting into that argument.

The answer given in the book is option (B). How can that be explained?

• Some pre-aromatic hydrocarbons can be easily oxidized by sulfur or similar rather weak oxidants into aromatic hydrocarbons. It is different type of reactions and it is not general – permeakra Jan 15 '13 at 8:00