5-Chloro-2-(phenyldiazenyl)pyridine

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5-Chloro-2-nitrophenol

The asymmetric unit of the title compound, C(6)H(4)ClNO(3), contains two independent mol-ecules in which the dihedral angles between the benzene ring and the nitro groups are 2.5 (1) and 8.5 (1)°. Intra-molecular O-H⋯O hydrogen bonds involving the hy-droxy and nitro substituents result in the formation of S(6) six-membered rings. In the crystal, O-H⋯O, O-H⋯Cl and C-H⋯O hydrogen bonds together w...

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2-Chloro-5-nitropyridine

The non-H atoms of the title compound, C(5)H(3)ClN(2)O(2), almost lie in a common plane (r.m.s. deviation = 0.090 Å). In the crystal, adjacent mol-ecules feature a short Cl⋯O contact [3.068 (4) Å], forming a chain; these chains are consolidated into a layer structure by non-classical C-H⋯O inter-actions.

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2-Chloro-5-nitroaniline

The mol-ecule of the title compound, C(6)H(5)ClN(2)O(2), is close to being planar (rms deviation = 0.032 Å for all non-H atoms), with a maximum deviation of -0.107 (3) Å for an O atom. In the crystal structure, inter-molecular N-H⋯O and N-H⋯N inter-actions link the mol-ecules into a three-dimensional network.

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5-Chloro-2-hydroxybenzaldehyde thiosemicarbazone

In the title compound, C(8)H(8)ClN(3)OS, the whole mol-ecule assumes a planar structure, with an r.m.s. deviation of 0.108 (2) Å, and an intra-molecular O-H⋯N hydrogen bond generates and S(6) and ring motif. In the crystal structure, each of two pairs of inter-molecular N-H⋯S hydrogen bonds connects two mol-ecules, forming inversion dimers with R(2) (2)(8) motifs.

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