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The conformation of the title molecule, C17H17N3S, is stabilized by an intramolecular N—H...N hydrogen bond involving the azometinic group. The dihedral angle between the two aromatic rings is 36.49 (06)°. The non-aromatic ring of the tetralone substituent adopts a sofa conformation. In the crystal, molecules are linked by pairs of N—H...S hydrogen bonds relatedviacentres of symmetry, forming dimers.

The reaction of 2-(1,2,3,4-tetrahydronapthalen-1-ylidene)hydrazinecarbothioamide (TTSC) with pyrazine-2,3,5,6-tetracarbonitrile (tetracyanopyrazine, TCNP) yields the title 2:1 charge-transfer adduct, 2C11H12N3S·C6N8. The complete TCNP molecule is generated by a crystallographic inversion centre and the non-aromatic ring in the TTSC molecule adopts an envelope conformation with a methylene C atom as the flap. In the crystal, the thiosemicarbazone molecules are connected through inversion-related pairs of N—H...S interactions, building a polymeric chain along theb-axis direction. The TCNP molecules are embedded in the structure, forming TTSC–TCNP–TTSC stacks with the aromatic rings of TTSC and the molecular plane of TCNP in a parallel arrangement [centroid–centroid distance = 3.5558 (14) Å]. Charge-transfer (CT)viaπ-stacking is indicated by a CT band around 550 cm−1in the single-crystal absorption spectrum.

Made available in DSpace on 2022-04-28T19:00:19Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-08-06 The title compound, C11H21N3S, consists of a menthone moiety attached to an extended thiosemicarbazone group with the N - N - C - N torsion angle being 11.92 (16)°. The cyclohexane ring has a chair conformation and the conformation about the C=N bond is E. In the crystal, molecules are linked via pairs of N - H⋯S hydrogen bonds, forming chains along the a axis. The absolute structure could be assigned with reference to the starting material, i.e. enantiopure (-)-menthone [Flack parameter = 0.05 (5)]. Departamento de Química Universidade Federal de Sergipe, Av. Marechal Rondon s/n Institut für Anorganische Chemie Universität Bonn, Gerhard-Domagk-Strasse 1 Instituto de Química Universidade Estadual Paulista, Rua Francisco Degni s/n Instituto de Química Universidade Estadual Paulista, Rua Francisco Degni s/n

In the title compound, [Ni(C15H14N3O2S)2], the NiIIatom lies on a center of symmetry. The deprotonated ligands act asN,S-donors, forming five-membered metalla-rings. The NiIIatom is four-coordinated in a slightly distorted square-planar environment. In the crystal, the discrete complex molecules are linked by weak N—H...O hydrogen bonds, generating chains along [110]. The chains are further connectedviaweak O—H...N interactions into a layered network extending parallel to (001).