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In the cation of the title compound, [Ru(CH3CN)2(C10H8N2)2](BF4)2, the RuII atom is six-coordinated in a distorted octa­hedral geometry by the N atoms of the two 2,2′-bipyridine (bpy) ligands and two cis-arranged acetonitrile mol­ecules. The dihedral angles formed by the pyridine rings of the bpy ligands are 8.86 (12) and 10.12 (14)°. In the crystal, the cations and anions are linked by C—H...F hydrogen bonds into a three-dimensional network.

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Through a diffusion reaction, cuprous bromide, triphenyl­phosphane and 1,3-bis­(pyridin-4-yl)propane (bpp) were self-assembled to form the one-dimensional title compound, [Cu2Br2(C13H14N2)(C18H15P)2]n. Each CuI atom is coordinated by two Br atoms, one P atom from a triphenyl­phosphane ligand and one N atom from a bpp mol­ecule in a distorted tetra­hedral geometry. Two μ2-Br bridges connect two [Cu(PPh3)]+ units to form neutral [CuBr(PPh3)]2 dimers, which are linked by the flexible bridging bpp ligands to form a one-dimensional chain structure parallel to the c axis. The dihedral angle between the pyridine rings of the bpp ligand is 34.59 (14)°.

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The title complex, [Cu3WBrOS3(C18H15P)3], a neutral heavily distorted cubane-like W/S/Cu cluster, was self-assembled from ammonium trithio­tungstate(VI), cuprous bromide and triphenyl­phosphane in N,N-dimethyl­formamide. The average Cu—Br, Cu—S and W—μ3-S bond lengths are 2.731 (2), 2.318 (2) and 2.256 (2) Å, respectively, in the distorted cubane-like skeleton. The W atom exhibits tetra­hedral geometry, formed by one terminal O atom and three μ3-S atoms; the W—O bond length is 1.728 (6) Å. Each Cu atom is coordinated by one P atom from a triphenyl­phosphane ligand, and two μ3-S and one μ3-Br atoms, forming a distorted tetra­hedral coordination geometry.

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The title compound, C24H22N2O4·H2O, was obtained by the reaction of 3,4-dimeth­oxy­benzaldehyde, malononitrile and 5-phenyl­cyclo­hexane-1,3-dione. The cyclo­hexyl and pyran rings show half-boat and V-shaped conformations, respectively. The dihedral angle between the phenyl and benzene ring planes is 30.67 (9)°. The organic mol­ecules are packed in a two-dimensional network parallel to the bc plane stabilized by inter­molecular N—H...N and N—H...O hydrogen bonds.

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In the cation of the title compound, [Ru(C15H10ClN3)2]Cl2·2H2O, the metal atom exhibits a distorted octa­hedral coordination geometry provided by the N atoms of two tridentate terpyridine ligands. The ligands are approximately planar [maximum deviation = 0.156 (5) Å] and form a dihedral angle of 87.0 (3)°. In the crystal, the cations, anions and water mol­ecules are linked into a three-dimensional network by C—H...Cl, C—H...O and O—H...Cl hydrogen bonds.

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In the cation of the title organic ion pair compound, C23H20ClN2O3+·CH3O, the cyclo­hexyl ring shows a half-boat conformation and the dihedral angles between two benzene rings and the pyran ring are 83.14 (7) and 73.18 (9)°. In the crystal, centrosymmetrically related cations are linked into a dimer by pairs of N—H...N hydrogen bonds, generating an R22(12) ring motif. The anion inter­acts with the dimer through an N—H...O hydrogen bond. π–π inter­actions between pyran rings of adjacent dimers, with a centroid–centroid distance of 3.861 (2) Å, are also observed.

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In the title compound, C15H12FN3O3·CH3OH, the dihedral angle between the quinazoline ring system and the benzene ring is 81.18 (9)°. In the crystal, mol­ecules are linked by N—H...O and O—H...N hydrogen bonds, generating [10-1] chains of alternating main mol­ecules and solvent mol­ecules. Weak C—H...O inter­actions are also observed.

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The title compound, C13H15NO2, was synthesized from 3,5-dimeth­oxy­benzaldehyde. The dihedral angle between the pyrrole and benzene rings is 89.91 (5)°. In the crystal, weak C—H...O and C—H...π interactions link the mol­ecules into a three-dimensional network.
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