CHCHCl

CHCHCl is not a standalone chemical with a widely recognized name; rather, it is a fragmental notation used to describe a two-carbon portion of a molecule. In this usage, it denotes a structure where one carbon bears a single hydrogen (CH) and the adjacent carbon bears a hydrogen and a chlorine substituent (CHCl). As a fragment, its overall connectivity depends on the larger molecular context.

In structural shorthand, the fragment can be written as -CH-CHCl-, representing a carbon–carbon bond with the described substituents. The full molecular formula of this fragment is C2H2Cl, though the exact arrangement within a larger compound may vary with surrounding groups or ring systems. The fragment is sometimes encountered in reaction schemes or mechanistic diagrams, including discussions of radical intermediates such as CH•-CHCl, where the first carbon bears an unpaired electron.

CHCHCl is not an IUPAC name or a standard nomenclature for a discrete substance. If the fragment appears in literature, the surrounding structure must be examined to determine connectivity, stereochemistry, and potential resonance or radical character. It is related to, but distinct from, well-defined entities such as vinyl chloride (CH2=CHCl) and other chlorinated ethene derivatives.

See also: vinyl chloride, ethyl chloride, chlorinated ethenes, radical intermediates in polymerization. Safety notes depend on the actual compound in which the fragment appears; CHCHCl by itself is not a hazardous substance, but the properties of the full molecule may be.