4-Chlorophenylboronic acid, identified by CAS number 1679-18-1, is a versatile organoboron compound widely utilized in modern synthetic chemistry. Appearing as a white to off-white crystalline solid, it serves as a crucial arylating agent. Its chemical structure features a benzene ring substituted with a chlorine atom at the para position and a boronic acid functional group, providing a specific reactive handle for forming carbon-carbon bonds.
This compound is valued for its stability and ease of handling compared to many other organometallic reagents. In research and industrial settings, it acts as a fundamental building block for the construction of complex molecular architectures. Proper storage in a cool, dry environment is recommended to maintain its chemical integrity, as boronic acids can undergo dehydration to form cyclic anhydrides or boroxines over time.