Acta Crystallographica Section C

Crystal Structure Communications

Volume 57, Part 2 (February 2001)

organic compounds

 

Hydrogen bonding in C-methylated nitroanilines: three triclinic examples with Z' = 2 or 4

D. Cannon, C. Glidewell, J. N. Low, A. Quesada and J. L. Wardell

Abstract: 4-Methyl-2-nitroaniline, (I), C₇H₈N₂O₂, crystallizes with two molecules in the asymmetric unit. The molecules both form intramolecular N-HO hydrogen bonds and they are linked into hydrogen-bonded C₂²(12) chains in which the two independent molecules alternate. 4,5-Dimethyl-2-nitroaniline, (II), C₈H₁₀N₂O₂, also has Z' = 2 and the two independent molecules each form hydrogen-bonded C(6) chains. In 4-methyl-3-nitroaniline, (III), C₇H₈N₂O₂, there are four molecules in the asymmetric unit. Molecules of two of these types are linked by N-HO hydrogen bonds into molecular ladders containing R₄³(18) rings and the other two types independently form single C(7) chains.

Formula: C₇H₈N₂O₂, C₈H₁₀N₂O₂ and C₇H₈N₂O₂

	Structure factor file (CIF format) (139.8 kbytes) Contains datablock I
	Structure factor file (CIF format) (170.1 kbytes) Contains datablock II
	Structure factor file (CIF format) (333.3 kbytes) Contains datablock III

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