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In the title compound, [Ni(C15H14N3O2S)2], the NiII atom lies on a center of symmetry. The deprotonated ligands act as N,S-donors, forming five-membered metalla-rings. The NiII atom 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 connected via weak O—H...N inter­actions into a layered network extending parallel to (001).

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In the title compound, [Ni(NCS)2(C5H5N)2]n, the Ni2+ cation is coordinated by four thio­cyanate anions (μ-1,3) and two pyridine ligands within a slightly distorted octa­hedral configuration. The Ni—N bond lengths to the pyridine rings are 2.1189 (17) and 2.1241 (17) Å, whereas those to the thiocyanate anions are 2.0299 (18) and 2.0359 Å. The Ni—S bond lengths are 2.5357 (6) and 2.5568 (6) Å. The Ni2+ cations are linked by N:S-bridging thio­cyanate ligands into chains extending along [010]. The Ni...Ni distance within the chains is 5.5820 (5) Å. The asymmetric unit contains two Ni2+ cations of which one is located on a centre of inversion, whereas the second is located on a general position.

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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 related via centres of symmetry, forming dimers.

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In the title compound, C15H15N3O2S, the central C—N—N—C unit has an anti conformation [torsion angle = −170.17 (15)°]. The phenyl substituent is oriented perpendicular to this unit [dihedral angle of 89.2 (1)°], whereas the substituted ring is rotated out of this plane by only 18.86 (17)°. In the crystal, mol­ecules are linked by pairs of N—H...S hydrogen bonds into inversion dimers that are further connected via N—H...O and O—H...S hydrogen bonds into a three-dimensional network.

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There are two independent mol­ecules in the asymmetric unit of the title compound, C12H15N3S, both of which display disorder of several C atoms in the N-bound ring (occupancy ratios of 0.75:0.25 in the first independent mol­ecule and 0.50:0.50 in the second) with the methyl H atoms also being disordered in the first mol­ecule (occupancy ratio of 0.70:0.30). The planes of the benzene ring and the N—N—C—N fragment make dihedral angles of 12.92 (14)° in the first independent mol­ecule and 7.60 (13)° in the second. In the crystal, mol­ecules are linked by weak N—H...S hydrogen bonds into chains along the a-axis direction. The crystal packing ressembles a herringbone arrangement.

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In the crystal structure of the title compound, [Zn(NCS)2(C12H10ClN)2], the Zn2+ cation is N-coordinated by two terminally bonded thio­cyante anions and by two 4-(4-chloro­benz­yl)pyridine ligands within a slightly distorted tetra­hedron. The asymmetric unit consists of half of the discrete complex, the central Zn2+ cation of which is located on a twofold rotation axis. The discrete complexes are linked into layers via a weak inter­molecular hydrogen-bonding inter­action, with a H...Cl distance of 2.85 Å and a C—H...Cl angle of 151°. These layers extend parallel to the ab plane and are held together by dispersion forces only.

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In the crystal structure of the polymeric title compound, [Mn(NCS)2(C10H8N2)]n, the MnII cations are coordinated by one chelating 2,2′-bi­pyridine ligand and four thio­cyanate anions (two N- and two S-coordinating), forming a distorted [MnN4S2] octa­hedron. The asymmetric unit consists of one manganese cation located on a twofold rotation axis and half of a 2,2′-bi­pyridine ligand, the other half being generated by the same twofold rotation axis, as well as one thio­cyanate anion in a general position. The MnII cations are linked by two pairs of μ1,3-bridging thio­cyanate ligands into chains along the c axis; because the N atoms of the 2,2′-bi­pyridine ligands, as well as the N and the S atoms of the thio­cyanate anions, are each cis-coordinating, these chains show a zigzag arrangement.

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In the crystal structure of the title compound, [Cd(NCS)2(C9H13N)2]n, the CdII cations are coordinated in a slightly distorted octa­hedral geometry by one 3-tert-butyl­pyridine ligand, one 4-tert-butyl­pyridine ligand and two pairs of translationally-equivalent μ-1,3-bridging thio­cyanate ligands, all of which are in general positions. These μ-1,3-bridging thio­cyante anions bridge the CdII cations, forming chains that propagate parallel to the b axis.

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Although the mol­ecular structure of the title compound, C22H32N4O8, displays a twofold symmetry of the mol­ecule including the meth­oxy and methyl substituents, no crystallographic twofold symmetry is observed in the X-ray structure analysis. The carbonyl O atoms alternately point to different sides of the plane defined by the carbonyl C atoms. Two meth­oxy groups are oriented inside the mol­ecules cavity. The H atoms of two methyl groups are disordered over two orientations and were refined using a split model.

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In the crystal structure of the title compound, C28H36I2S3, a terthio­phene monomer, the central thio­phene unit is arranged anti-coplanar to the two outer thio­phene rings. There are two crystallographically independent mol­ecules in the asymmetric unit, which show different conformations. In one mol­ecule, the dihedral angles between the inner and the two outer thiophene rings are 15.7 (3) and 3.47 (3)°, whereas these values are 4.2 (3) and 11.3 (3)° for the second mol­ecule. Differences are also found in the arrangement of the hexyl chains: in one of the two molecules, both chains are nearly in plane to the central moiety, whereas in the second molecule, only one chain is in plane and the other one is nearly perpendicular to the central moiety. Some of the C atoms are disordered and were refined using a split model with occupancy ratios of 0.65:0.35 and 0.70:0.30 in the two mol­ecules.
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