CHCH3CH2
CHCH3CH2 is a chemical formula that represents a hydrocarbon radical. This formula can be interpreted in a few ways depending on the context of how it is written, but it most commonly refers to a propyl radical. Specifically, it can be seen as a three-carbon chain with a double bond involving one of the carbons, and a methyl group attached to one of the carbons involved in the double bond. Alternatively, it could represent a species with a single unpaired electron on one of the carbon atoms.
In organic chemistry, radicals are species with unpaired electrons, making them highly reactive. The CHCH3CH2 radical