How does carbon-halogen bond strength change from fluorine to iodine?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

organohalogen compound Vinyl chloride is an organohalogen compound that has important industrial applications. When treated with certain catalysts, vinyl chloride monomers undergo polymerization and form the larger compound known as polyvinyl chloride, or PVC. PVC is used in the manufacture of numerous products, including packaging films and water pipes.

In the context of organohalogen compounds, the strength of the carbon-halogen bond decreases as you move from fluorine to iodine.12

Specifically, the carbon-fluorine bond is the strongest, while the carbon-iodine bond is the weakest. This trend in bond strength directly influences the chemical behavior of these compounds: because the carbon-fluorine bond is the strongest, fluorides are typically the least reactive, whereas iodides, possessing the weakest bonds, are the most reactive. There is a general correlation where stronger carbon-halogen bonds result in slower reaction rates, making certain reactions that are practical for other halides too slow to be useful when applied to fluorides.21