Diketene is an organic compound with the formula (CH2CO)2. It is formed by dimerization of ketene (IUPAC name: ethenone). Diketene is a member of the oxetane family. It is used as a reagent in organic chemistry. It is a colorless liquid. ==Production== Ketene is generated by dehydrating acetic acid at 700–750 °C in the presence of triethyl phos...