(Z)-2-(2-Isopropyl-5-methylphenoxy)-N′-(2-oxoindolin-3-ylidene)acetohydrazide

Abstract

In the title Mannich base, C20H21N3O3, an isatin derivative of thymol, the O—CH2—C(=O)–N(H)—N fragment connecting the aromatic and fused-ring systems is approximately planar, with the N—N single bond in a Z configuration. The amino H atom of this N—N fragment is intramolecularly hydrogen bonded to the carbonyl O atom of the indolinone fused ring as well as to the phenoxy O atom of the aromatic ring. The amino H atom of the indoline fused ring forms a hydrogen bond with the double-bond O atom of an adjacent molecule, this hydrogen bond giving rise to a linear chain motif.