In organic chemistry, methylenation is a chemical reaction that inserts a methylene () group into a chemical compound:
In organic chemistry, methylenation is a chemical reaction that inserts a methylene () group into a chemical compound: \ce{A-B} \longrightarrow \ce{A}{\color{red}\ce{-CH2 -}}\ce{B}
In a related sense, it also describes a process in which a divalent group of a starting material is removed and replaced with a terminal CH2 group: \ce{A=E} \longrightarrow \ce{A}{\color{red}\ce{=CH2}}
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).