Solid-to-solid Reaction of 2,4-Dinitrophenylhydrazine with Several Aromatic Aldehydes Bearing Electron-donating Groups

TLDR: Aromatic 2,4-dinitrophenylhydrazones are conveniently prepared from 2, 4-dinitirophenyhydrazyne and the corresponding aldehydes bearing electron-donating groups [N(Me)2, OMe and OH] in non-solvent reactions as discussed by the authors.

Abstract: Aromatic 2,4-dinitrophenylhydrazones are conveniently prepared from 2,4-dinitrophenylhydrazyne and the corresponding aldehydes bearing electron-donating groups [N(Me)2, OMe and OH] in non-solvent reactions. The high-dilution method in the absence of basic or acidic catalysts is also efficient. According to X-ray data, planar conformation of the hydrazone molecules is stabilized by intramolecular NH…O2N hydrogen bond. Formation of 2D networks in the crystal is mediated via intermolecular CH…O2N hydrogen bonds.