Definition of quinone diimine
1 : a colorless crystalline compound HN=C6H4=NH regarded as derived from quinone (see quinone 1a) by replacement of both oxygen atoms by imino groups but made by oxidation of para-phenylenediamine —called also p-benzoquinone diimine, p-quinone diimine
2 : a compound derived from a quinone by replacement of both oxygen atoms by imino groups
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Origin and Etymology of quinone diimine
diimine from di- + imine
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