Acta Crystallographica Section C

Crystal Structure Communications

Volume 59, Part 3 (March 2003)

Acta Cryst. (2003). C59, o98-o101 [doi:10.1107/S0108270103001379]

A chain of edge-fused rings generated by the combination of an N-HO hydrogen bond and an iodo-nitro interaction in 2-iodobenzaldehyde 4-nitrophenylhydrazone versus disordered and effectively isolated molecules in 2-iodobenzaldehyde 2,4-dinitrophenylhydrazone

C. Glidewell, J. N. Low, J. M. S. Skakle and J. L. Wardell

Abstract: Molecules of 2-iodobenzaldehyde 4-nitrophenylhydrazone, C₁₃H₁₀IN₃O₂, are effectively planar and are linked by an N-HO hydrogen bond [HO = 2.04 Å, NO = 2.905 (6) Å and N-HO = 166°] and a two-centre iodo-nitro interaction [IO = 3.361 (4) Å] into a chain of edge-fused (18) rings. There are no direction-specific interactions between adjacent chains. Molecules of 2-iodobenzaldehyde 2,4-dinitrophenylhydrazone, C₁₃H₉IN₄O₄, are disordered over two orientations with occupancies of 0.681 (5) and 0.319 (5). In the major orientation, there are no direction-specific intermolecular interactions, while for the minor form, a single C-HO hydrogen bond generates centrosymmetric dimers.

Formula: C₁₃H₁₀IN₃O₂ and C₁₃H₉IN₄O₄

Online 11 February 2003


	Structure factor file (CIF format) (137.5 kbytes) Contains datablock II

	Structure factor file (CIF format) (143.5 kbytes) Contains datablock III

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