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How does the carbon atom bonded to a halogen determine the class of an organohalogen compound?
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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.
The classification of an organohalogen compound is primarily determined by the bonding environment of the specific carbon atom to which the halogen is attached. This carbon atom dictates the compound's class based on its hybridization and bonding partners:1
- Alkyl halides: The carbon bearing the halogen is involved only in single bonds. These are further classified as primary, secondary, or tertiary based on whether that carbon is bonded to one, two, or three other carbon atoms, respectively.12
- Vinylic halides: The carbon bearing the halogen is part of a double bond with another carbon atom.1
- Aryl halides: The halogen-bearing carbon is a component of an aromatic ring.1
- Acyl halides: The halogen-bearing carbon is double-bonded to an oxygen atom.1
This classification is strictly based on the immediate bonding of the halogen-bearing carbon, regardless of other functional groups present elsewhere in the molecule.1