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The title compound, [Co(C13H18NO)2], was synthesized by the disproportionation of methyl-tetrakis­(tri­methyl­phosphine)­cobalt with 3-tert-butyl-N,5-di­methyl­salicyl­ald­imine in diethyl ether. The cobalt center in the structure is in a distorted tetrahedral geometry.

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In the title compound, C14H16N2O4, the ethyl chain of the ethoxy­carbonyl group displays rotational disorder. In the crystal structure, the mol­ecules are connected in a three-dimensional network through intermolecular N—H...O and O—H...O hydrogen-bond interactions.

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In the title compound, C9H12N6OS, the pyrazole and triazole rings are nearly coplanar, forming a dihedral angle of 6.50 (9)°. There are N—H...N intermolecular hydrogen-bond interactions in the crystal structure, providing stabilization.

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In the title compound, {[Mn(C2O4)(H2O)2]·H2O}n, the octa­hedrally coordinated Mn atom, lying on a twofold rotation axis, is bonded to four carbox­yl O atoms from oxalate groups and two O atoms from two water mol­ecules. By means of the bridging oxalate ligand, the title compound exhibits a one-dimensional chain structure. The crystal packing is stabilized by hydrogen bonds of the type O—H...O(oxalate).

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The tetra­dentate Schiff base ligand derived from the condensation of 3,5-dibromo­salicylaldehyde and 1,2-phenyl­enediamine, in the presence of pyridine, forms a square-pyramidal five-coordinate Zn complex, [Zn(C20H10Br4N2O2)(C5H5N)]·C3H7N0.

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The title compound, C13H13N5S, possesses crystallographically imposed mirror symmetry. In the crystal structure, the mol­ecules interact through strong intermolecular N—H...N hydrogen bonds to form ribbons running parallel to the a axis.

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In the title mol­ecule, C11H10N4O2, all bond lengths and angles are in normal ranges. In the crystal structure, weak intermolecular C—H...N hydrogen bonds link the mol­ecules into centrosymmetric dimers. The crystal packing is further stabilized by van der Waals forces.

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The title compound, C10H14O4, is used to cure coughs and clear up phlegm and it is also used as an inter­mediate in the synthesis of other medicinal products. The entire molecule, except for atoms C10 and O4, is essentially planar (to within 0.001 Å).

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In the crystal structure of the title compound, C12H18N4O3, the mol­ecules inter­act through inter­molecular N—H...O and C—H...O hydrogen bonds to form dimers, providing stabilization.

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In the title mol­ecule, C25H20FN3O2S, the central tricyclic system is essentially planar. All bond lengths and angles are within normal ranges. The crystal packing is stabilized by π–π stacking inter­actions and van der Waals forces.

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The title compound, C14H12BrNO2, was prepared from 2-hydr­oxy-3-methoxy­benzaldehyde and 4-bromo­phenyl­amine. The 4-hydr­oxy-3-methoxy­phenyl and bromo­benzene groups are trans with respect to the imino bond. The planarity of the mol­ecule is supported by the conjugation of the imino group and the aromatic system, together with a resonance-assisted intra­molecular hydrogen bond [O—H...N = 2.610 (3) Å].

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In the title compound, C17H16O6, the asymmetric unit contains one half-mol­ecule. A twofold rotation axis passes through the C atom linking the two rings. Intra­molecular O—H...O hydrogen bonds seem to be effective in stabilizing the mol­ecular structure.
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