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In the crystal structure of the title compound, C12H8Cl2O4, mol­ecules crystallize in planes parallel to (-204) with an inter­planar distance of 3.288 (2) Å [centroid–centroid distance = 3.819 (2) and slippage = 1.932 (2) Å]. The structure features C—H...O inter­actions involving meth­oxy and aromatic H atoms and the carbonyl O atoms as well as a C—H...Cl inter­action involving an aromatic H atom. In addition there are short inter­halogen contacts between adjoining mol­ecules [Cl...Cl = 3.3709 (5) Å].

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The title mol­ecule, C24H15NO4, crystallizes with two mol­ecules in the asymmetric unit (Z′ = 2). For both mol­ecules, the two amide groups are not coplanar, as the dihedral angles of the respective NCO groups are similar at 50.37 (14) and 51.22 (13)°. However, the orientations of the substituent phenyl rings with the central naphthalene system are significantly different for the two mol­ecules; for one mol­ecule, these dihedral angles are 80.29 (3) and 80.95 (4)°, while for the second mol­ecule they are 86.63 (3) and 72.82 (4)°. The crystal packing shows the mol­ecules to be linked by weak C—H...O inter­actions.

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The title compound, C17H11NO3, was an inter­mediate synthesized during bis­acyl­ation of 2-amino-1,4-naphtho­quinone with benzoyl chloride. A mixture of block- and needle-shaped crystals were obtained after column chromatography. The block-shaped crystals were identified as the imide and the needles were the title amide. The naphtho­quinone scaffold is roughly planar (r.m.s. deviation = 0.047 Å for the C atoms). The N—H and C=O bonds of the amide group are anti to each other. A dihedral angle between the naphtho­quinone ring system and the amide group of 3.56 (3)°, accompanied by a dihedral angle between the amide group and the phenyl group of 9.51 (3)°, makes the naphtho­quinone ring essentially coplanar with the phenyl ring [dihedral angle = 7.12 (1)°]. In the crystal, molecules are linked by a weak N—H...O hydrogen bond and by two weak C—H...O interactions leading to the formation of zigzag chains along [010].
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