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The title compound, C12H13N3O, exists in an E configuration with respect to the C=N bond [1.285 (2) Å]. The imidazole ring forms a dihedral angle of 75.97 (10)° with the phenyl ring. In the crystal, mol­ecules are linked via O—H...N and C—H...N hydrogen bonds into sheets lying parallel to (001). The crystal structure also features C—H...π inter­actions.

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The title mol­ecule, C15H21N3S, exists as the thione tautomer in the solid state. The 1,2,4-triazole ring is almost planar (r.m.s. deviation = 0.004 Å) and the prop-2-en-1-yl chain is close to being perpendicular to this plane [C—N—C—C torsion angle = 77.1 (5)°]. In the crystal, centrosymmetric dimeric aggregates are formed by pairs of N—H...S hydrogen bonds as parts of eight-membered (...HNCS)2 synthons. These are connected into layers parallel to (101) via C—H...π inter­actions, where the π-system is the triazole ring. The investigated sample was a nonmerohedral twin; the refined domain ratio was 0.655 (4):0.345 (4).

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The title mol­ecule, C17H20N2O, is a functionalized hydrazine with benzoyl and adamantyl substituents attached to the two hydrazine N atoms. In the crystal, mol­ecules are linked via N—H...N hydrogen bonds, forming chains propagating along the a-axis direction. There are also C—H...O, C—H...N and C—H...π inter­actions present within the chains.
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