Alkenes

Question 1

What is the general formula of an alkene?

Answer 1

C_nH_2n

Question 2

Are alkenes more or less reactive than alkanes?

Why?

Answer 2

More reactive

The double bond means they have a high e- density and so are easily attacked by elecrophiles

Question 3

Why can’t the C=C bond rotate?

Answer 3

There is a p-orbital (containing a single e- ) on each carbon. These orbitals overlap to form an orbital with a cloud of e- density above and below the bonds to form a pi orbital