Synthesis, characterization and supra­molecular analysis for (E)-3-(pyridin-4-yl)acrylic acid

In the title compound, the pyridine ring is fused to acrylic acid, forming an almost planar structure with an E-configuration about the double bond. In the crystal, O—H⋯N and C—H⋯O inter­actions together with π–π stacking inter­actions lead to the formation of the three-dimensional structure.