Exhibit 8-4
Consider the reaction below to answer the following question(s).

When dichlorocarbene is generated in the presence of an alkene,a dichlorocyclopropane is formed.

-Refer to Exhibit 8-4.The reaction of an alkene with dichlorocarbene is:
A)regiospecific.
B)Markovnikov.
C)stereospecific.
D)non-Markovnikov.

Question

Exhibit 8-4
Consider the reaction below to answer the following question(s).
​
When dichlorocarbene is generated in the presence of an alkene,a dichlorocyclopropane is formed.
​ 
-Refer to Exhibit 8-4.The reaction of an alkene with dichlorocarbene is:
A)regiospecific. 
B)Markovnikov. 
C)stereospecific. 
D)non-Markovnikov.

Quizplus · Accepted Answer

The reaction of an alkene with dichlorocarbene is stereospecific, meaning that the geometry (specifically, the cis/trans configuration) of the alkene is preserved in the product. This is because the carbene and alkene add in a syn manner, meaning that the two new carbon-carbon bonds are formed on the same side of the molecule. The reaction is not regiospecific or Markovnikov because the carbene can add to either carbon of the alkene double bond. It is also not non-Markovnikov because the carbene does not add preferentially to the less substituted carbon.

Exhibit 8-4 Consider the Reaction Below to Answer the Following Question(s)