ketenyl
Ketenyl is a chemical term that can refer to a few related concepts in organic chemistry. Most commonly, it describes a reactive intermediate species characterized by a carbon-carbon double bond adjacent to a carbonyl group, with the general formula R2C=C=O. This structure makes ketenyl species highly electrophilic at the terminal carbon atom. They are typically generated in situ and are not isolable due to their extreme reactivity.
Ketenyl can also be used as a substituent group, denoted as C=C=O, which is attached to another
The generation of ketenyl intermediates often involves the dehydrohalogenation of acyl halides or the thermolysis of