enamine

This term is a portmanteau of "ene" (referring to the alkene double bond) and "amine." It is used exclusively within the specialized register of organic chemistry to describe a specific functional group arrangement. In a laboratory setting, enamines are primarily valued as nucleophiles in synthetic pathways, such as the Stork enamine alkylation.

Because it refers to a specific class of chemical species, the term is used as a countable noun when referring to individual molecules or types of compounds, but often functions as a mass noun when discussing the chemical moiety or the general class of reagents.