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  • Title: pi-Stacked hydrogen-bonded chains of rings in 2,4-difluorobenzaldehyde isonicotinoylhydrazone and hydrogen-bonded sheets in 2,3-dichlorobenzaldehyde isonicotinoylhydrazone.
    Author: Wardell SM, de Souza MV, Ferreira Mde L, Vasconcelos TR, Low JN, Glidewell C.
    Journal: Acta Crystallogr C; 2005 Oct; 61(Pt 10):o617-20. PubMed ID: 16210773.
    Abstract:
    The difluorinated ring in 2,4-difluorobenzaldehyde isonicotinoylhydrazone, C13H9F2N3O, (I), is disordered over two sets of sites with unequal occupancy. The molecules of (I) are linked by a combination of N-H...O and C-H...O hydrogen bonds into chains of rings, which are linked into sheets by a single pi-pi stacking interaction. In 2,3-dichlorobenzaldehyde isonicotinoylhydrazone, C13H9Cl2N3O, (II), the molecules are linked by a combination of N-H...N, C-H...N and C-H...O hydrogen bonds into sheets of R(4)(4)(14) and R(4)(4)(26) rings.
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