Wiktionary
diimine
n. (context organic chemistry English) Any compound having two imine functional groups
Wikipedia
Diimine
Diimines are organic compounds containing two imine (RCH=NR') groups. The most popular derivatives are 1,2- diketones and 1,3-diimines. These compounds are used as ligands and as precursors to heterocycles. Diimines are prepared by condensation reactions where a dialdehyde or diketone is treated with amine and water is eliminated. Similar methods are used to prepare Schiff bases and oximes.