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The title compound, C12H16N2S3, was obtained by the condensation reaction of S-benzyl dithio­carbazate and 3-mercaptobutan-2-one. The phenyl ring and thiol (SH) group are approximately perpendicular [S—C—C—C and N—C—C—S torsion angles = 67.8 (3) and 116.9 (2)°, respectively] to the rest of the mol­ecule. In the crystal, mol­ecules are linked by weak S—H...S and N—H...S hydrogen bonds, π–π inter­actions between the benzene rings [centroid–centroid distance = 3.823 (2) Å] and C—H...π inter­actions.

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The title compound, [Ni(C13H11N4S2)2], was obtained by the reaction of S-2-picolyldi­thio­carbazate and pyridine-2-carbaldehyde with nickel(II) acetate. The NiII atom is located on a twofold rotation axis and is bonded to four N atoms at distances of 2.037 (8) and 2.109 (9) Å, and to two S atoms at a distance of 2.406 (3) Å, leading to a distorted octa­hedral coordination. The angle between the mean planes of the coordinating moieties of the two symmetry-related tridentate ligands is 83.3 (2)°. In the crystal, complex mol­ecules are linked by weak C—H...S hydrogen bonds, π–π inter­actions between the pyridine rings [centroid–centroid distance = 3.775 (9) Å] and C—H...π inter­actions. The hydrogen-bonding inter­actions lead to the formation of layers parallel to (010); π–π inter­actions link these layers into a three-dimensional network.

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The title compound, C33H42O4 [systematic name: (1S,5S,7R)-3-benzoyl-4-hy­droxy-8,8-dimethyl-1,5,7-tris­(3-methyl­but-2-­enyl)bi­cyclo­[3.3.1]nona-3-ene-2,9-dione], has a central bi­cyclo­[3.3.1]nonane-2,4,9-trione surrounded by tetra­prenyl­ated and benzoyl groups. The compound was recrystallized several times in methanol using both a slow evaporation method and with a crystal-seeding technique. This subsequently produced diffraction-quality crystals which crystallize in the ortho­rhom­bic space group P212121, in contrast to a previous report of a structure determination in the Pna21 space group [McCandlish et al. (1976). Acta Cryst. B32, 1793–1801]. The title compound has a melting point of 365–366 K, and a specific rotation [α]20 value of +51.94°. A strong intra­molecular O—H...O hydrogen bond is noted. In the crystal, mol­ecules are assembled in the ab plane by weak C—H...O inter­actions.
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