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The complete mol­ecule of the title compound, C19H32S2, is generated by crystallorgaphic twofold symmetry, with three C atoms lying on the axis. The Car—C—S—C (ar = aromatic) torsion angle is 156.2 (2) °. In the crystal, the mol­ecules are linked by very weak C—H...S inter­actions, generating [001] chains.

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The title compound, C12H10N2O, a second monoclinic poly­morph of (E)-phen­yl(pyridin-2-yl)methanone oxime crystallizes in the space group P21/n (Z = 4). The previously reported polymorph [Taga et al. (1990). Acta Cryst. C46, 2241–2243] occurs in the space group C2/c (Z = 8). In the crystal, pairs of bifurcated O—H...(N,O) hydrogen bonds link the mol­ecules into inversion dimers. The dimers are linked by C—H...π inter­actions, forming a linear arrangement. The dihedral angle between the pyridine and phenyl rings is 67.70 (8)°.

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In the title compound, [Ru(CH3OCS2)2(C18H15P)2], the RuII atom is in a distorted octa­hedral coordination by two xanthate anions (CH3OCS2) and two tri­phenyl­phosphane (PPh3) ligands. Both bidentate xanthate ligands coordinate the RuII atom with two slightly different Ru—S bond lengths but with virtually equal bite angles [71.57 (4) and 71.58 (3)°]. The packing of the complexes is assured by C—H...O and C—H...π inter­actions.

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The title compound, [Pd2Cl2(C6H5S)2(C18H15P)2]·2CHCl3, contains a centrosymmetric dinuclear palladium complex with the PdII cation in a slightly distorted square-planar coordination environment. The PdII cations are bridged by the S atoms of two benzene­thiol­ate ligands with different Pd—S distances [2.2970 (11) and 2.3676 (11) Å]. The coordination of the metal atom is completed by a chloride anion [2.3383 (11) Å] and a tri­phenyl­phosphane ligand [2.2787 (11) Å]. Weak C—H...Cl inter­actions are present between complex mol­ecules and the CHCl3 solvent mol­ecule. The latter is disordered over two positions in a 0.792 (8):0.208 (8) ratio. The crystal under investigation was found to be twinned by nonmerohedry, with a fraction of 73.4 (1)% for the major twin component.

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In the title compound, C24H20N6O, the pyridin-3-yl groups on the ethyl­ene fragment are found in a trans conformation with a C(py)—C(e)—C(e)—C(py) (py = pyridine, e = ethylene) torsion angle of 179.2 (3)°. The dihedral angle between the pyridine rings is 3.5 (1)°. In the crystal, N—H...N and C—H...O=C inter­actions form a layer arrangement parallel to the bc plane. The compound displays disorder of the ethyl­ene fragment over two positions with an occupancy ratio of 0.676 (7) to 0.324 (7) that extends into the amide section of the nicotinamide moiety.

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In the cation of the title compound C9H14ON+·C3H2O3N3, the benzyl­amine C—N bond subtends a dihedral angle of 78.3 (2)° with the phenyl ring. The cyanurate anion is in the usual keto-form and shows an r.m.s. deviation from planarity of 0.010 Å. In the crystal, the cyanurate anions form N—H...O hydrogen-bonded zigzag ribbons along [001]. These ribbons are crosslinked by the organocations via O—H...N and N—H...O hydrogen bonds, forming bilayers parallel to (010) which are held together along [010] by slipped π–π inter­actions between pairs of cyanurate anions [shortest contact distances C...C = 3.479 (2), O...N = 3.400 (2); centroid–centroid distance= 4.5946 (9) Å] and between cyanurate and phenyl rings [centroid–centroid distance = 3.7924 (12) Å, ring–ring angle = 11.99 (10)°].
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