3-
The title compound, C(18)H(13)NO(3), exists as a ketoamino tautomer implying a fairly short N-H.O intramolecular hydrogen bond between the 2-naphthalenone and amino moieties [N.O 2.531 (3) A] which is enhanced by the pi-electron delocalization effect. The naphthaldimine and 3-carboxyphenyl fragments are inclined at an angle of 4.41 (7) degrees, so the molecule is almost planar. The molecules are connected by intermolecular O-H.O hydrogen bonds between the carboxy and keto O atoms, forming infinite chains around the twofold screw axes parallel to b.
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