Concomitant colour polymorphs of (Z)-N-(4-fluorophenyl)-2-oxopropanehydrazonoyl chloride.

ABSTRACT: The title compound, (Z)-N-(fluorophenyl)-2-oxopropanehydrazonoyl chloride, C₉H₈ClFN₂O, was found to form concomitant colour polymorphs upon recrystallization from acetone. Block-shaped pale-orange crystals of form I (space group P2₁/n, No. 14) and prism-shaped yellow crystals of form II (space group P2₁/c, No. 14) both belong to the monoclinic crystal system. N-H...O hydrogen bonds resulting in zigzag chains [graph-set descriptor C(6)] are the dominating intermolecular interactions in both crystal forms. The hydrogen-bonded zigzag chains so formed extend by 2₁ screw symmetry in form I and by c-glide symmetry in form II, and are arranged in layers, which are more corrugated in form II than in form I. The polymorphs are virtua

SUBMITTER: Muller L 

PROVIDER: S-EPMC12322930 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature