The allyl group is a common functional group in organic chemistry that consists of a three-carbon chain attached to a carbon-carbon double bond and a single bond to a terminal methyl group. Synonyms for the allyl group include propenyl, 2-propenyl, and 3-carboxypropyl. These terms are often used interchangeably and refer to the same molecular configuration. The allyl group is commonly found in many natural and synthetic compounds, including fatty acids, plant hormones, and polymerization initiators. Its unique bonding arrangement and reactive properties make it a valuable component in organic synthesis and chemical reactions. Understanding the different names for the allyl group is important for efficient communication in the field of chemistry.