Perinone

Perinone is a class of organic compounds.

The parent compound has two isomers, each of which are useful pigments.

It is prepared from naphthalenetetracarboxylic dianhydride by condensation with o-phenylenediamine.

The trans isomer is called Pigment Orange 43 ("PO43", CID 78141 from PubChem) and the cis isomer is called Pigment Red 194 ("PR194", CID 77892 from PubChem).

[2] Like some structurally related compounds perinone is also an organic semiconductor.

trans-Perinone. cis mirrors one half top-to-bottom
trans -Perinone. cis mirrors one half top-to-bottom