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The title compound, [Cu(C2Cl3O2)2(C3H4N2)4], was prepared by the reaction of imidazole and trichloro­acetatocopper(II). The CuII atom adopts a distorted octa­hedral coordination geometry, binding the N atoms of four imidazole ligands and the carboxyl­ate O atoms of two trichloro­acetate anions. The mol­ecular structure and packing are stabilized by N—H...O hydrogen-bonding inter­actions. Close inter­molecular Cl...Cl contacts [3.498 (3) Å] are also found in the structure.

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In the title compound, C22H23NO4·C2H6O, the pyridyl ring is aligned at 89.39 (2) and 87.41 (2)° with respect to the benzene rings, and the three rings connected to the methine C atom are arranged in a propeller-like conformation. The heterocycle is linked to the solvent mol­ecule by an O—H...N hydrogen bond.

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In the title compound, C11H16N4S, an intra­molecular N—H...N hydrogen bond generates an S(5) ring. In the crystal, inversion dimers linked by pairs of N—H...S bonds occur, generating an R22(8) loop.

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In the title compound, C13H12N2OS, the dihedral angle between the aromatic rings is 14.84 (17)°. In the crystal, inversion dimers linked by pairs of N—H...O hydrogen bonds generate R22(8) loops.

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In the title compound, C11H15N3S, an intra­molecular N—H...N hydrogen bond generates an S(5) ring. In the crystal, inversion dimers linked by pairs of N—H...S bonds occur, generating an R22(8) loop.

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In the title compound, C13H12N2O2S, the dihedral angle between the aromatic rings is 15.20 (11)°. In the crystal, inversion dimers linked by pairs of N—H...O hydrogen bonds generate R22(8) loops.

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The title compound, C10H12N2O2, was prepared by the reaction of methyl carbazate and 4-methyl­benzaldehyde. The dihedral angle between the benzene ring and the carbazate fragment is 20.86 (10)°. In the crystal structure, mol­ecules are linked by inter­molecular N—H...O hydrogen bonds.

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The title compound, C13H9N3OS, was prepared by the reaction of thio­phene-2-carbohydrazide and 4-formyl­benzonitrile. The dihedral angle between the benzene and thio­phene rings is 11.9 (1)°. In the crystal structure, mol­ecules are linked into centrosymmetric dimers by pairs of N—H...O hydrogen bonds.
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