Structure of Di-tert-butyl(3,4-dicyanophenyl)(hydroxy)malonate, C₁₉H₂₂N₂O₅

Abstract

The title compound, C₁₉H₂₂N₂O₅, was synthesized by the reaction of 4-nitrophthalo-nitrile and di-tert-butylmalonate. The compound crystallizes in orthorhombic P2₁2₁2₁; a = 5.9831(1)Å, b = 14.7805(2)Å, c = 23.0614(3)Å. The tert-butyl groups show large amplitudes of internal rotational motion. In the solid state, the molecules are linked by O-H…O hydrogen bonds to form an infinite one-dimensional chain along the a-axis.