Next we take again E-2-butene, and let a second chlorine attack the chloronium ion. Replacing the OH by chlorine gives the following four structures:
Question 9: Again, how are these four compounds related?The correct answer should support our remark, that the erythro stereo pair on the previous page corresponds to a meso compound if the chiral centers carry the same substituents.
Can you now predict which compound(s) the reaction of chlorine with Z-2-butene would yield?
We conclude with a quiz!