What happens to the carbon-carbon double bond during the reaction of alkenes with halogens?

During the reaction of alkenes with halogens, the carbon-carbon double bond undergoes a transformation. Alkenes contain a double bond between two carbon atoms, which is formed by one sigma bond and one pi bond. When halogens react with alkenes, this double bond is broken, and a new single bond forms between each carbon atom of the alkene and the halogen atoms.

This transformation results in the carbon-carbon double bond converting to a single bond, which allows for the attachment of halogen atoms. As a result, a molecule that originally contained a double bond now has single bonds connecting the carbon atoms to the halogens. This process is characterized by the addition of halogen molecules across the double bond, leading to the saturation of the alkene.

Therefore, the correct answer reflects this conversion, as the double bond between the carbon atoms indeed becomes a single bond during the reaction with halogens.