ABSTRACT: The mol-ecule of the title compound, C(26)H(18)N(4), resides on a crystallographic inversion centre with a dihedral angle of 44.94?(5)° between the benzimidazole ring system and the benzene ring. The primary hydrogen bond is C-H?N and inversion-related pairs of these generate a chain of rings along the c-axis direction; ??? stacking involving the benzimidazole groups with inter-planar separations of ca 3.4?Å complete the inter-actions.
Project description:In the title compound, [CoCl(2)(C(26)H(18)N(4))](n), the Co(II) atom (site symmetry 2) is tetra-hedrally coordinated by two chloride ions and two N atoms from 4,4'-bis-(benzimidazol-1-yl)biphenyl ligands: the complete ligand is generated by crystallographic twofold symmetry. The dihedral angle between the benzene rings is 34.67?(8)° and the angle between the benene ring and the adjacent benzimidazole ring system is 43.26?(10)°. The bridging ligand links the Co(II) atoms into chains propagating in [[Formula: see text]01].
Project description:The asymmetric unit of the title compound, C(20)H(14)N(4)·CH(4)O, contains two independent half-mol-ecules, each located on an inversion centre, and a methanol solvent mol-ecule. The benzimidazolyl groups form different dihedral angles [24.0?(1) and 11.6?(1)°] with the plane of the central benzene ring in the two mol-ecules. In the crystal, a two-dimensional network is formed through N-H? N, N-H?O and O-H?N hydrogen-bonding inter-actions between the benzimidazole units and methanol solvent mol-ecules. ?-? stacking inter-actions also occur between the benzimidazole rings of adjacent mol-ecules, with centroid-centroid distances of 3.720?(14)?Å and inter-planar distances of 3.53?(1)?Å .
Project description:The aromatic mol-ecule of the title compound, C(20)H(14)N(4)·2C(3)H(7)NO, occupies a special position on an inversion center. The benzimidazole unit (planar to within 0.008?Å) forms a dihedral angle of 9.1?(2)° with the central benzene ring. The benzimidazole H atom participates in a hydrogen bond with the dimethyl-formamide solvent molecule, thus giving rise to the title 1:2 aggregate. These aggregates are further linked in the crystal structure by aromatic ?-? stacking inter-actions [centroid-centroid distance = 6.356?(2)?Å].
Project description:Crystals of the title compound, 2C(26)H(18)N(4)O(2)·C(7)H(8), were obtained from the reaction of 8-hydroxy-quinoline with 1,2-phenyl-enediamine in methanol and recrystallized from toluene. The compound contains three essentially planar ring systems: the benzimidazole ring (r.m.s. deviation = 0.039?Å) and two 8-hydroxy-quinoline rings (r.m.s. deviations of 0.0056?Å in both rings). The benzimidazole ring and one 8-hydroxy-quinoline ring are almost co-planar, forming a dihdral angle of 3.1?(2)°. The other 8-hydroxy-quinoline ring is almost perpendicular to the benzimidazole plane with a dihedral angle of 86.2?(2)°. Intra-molecular O-H?N contacts are present. The crystal structure is stabilized by inter-molecular O-H?N inter-actions. The complete toluene molecule is generated by crystallographic inversion symmetry; therefore its methyl group is disordered over two sites of equal occupancy.
Project description:The mol-ecules of the title compound, C(14)H(12)I(2)O(2), lie on inversion centers and are linked by I?O inter-actions with inter-molecular distances of 3.324?(3)?Å. The aromatic rings display no significant inter-calation or stacking inter-actions.
Project description:In the title compound, C(22)H(14)N(4), a new substituted benzimidazole, three inter-molecular C-H?N inter-actions link neighbouring mol-ecules into different dimers with R(2) (2)(12), R(2) (2)(8) and R(2) (2)(24) ring motifs. A fourth C-H?N inter-action links neighbouring mol-ecules along the c axis. There is also a short inter-molecular contact between the azomethine (C=N) segment of the benzimidazole ring and one of the C atoms of a neighbouring benzene ring [N?C = 3.191?(5), C?C = 3.364?(6)?Å], which links the mol-ecules along the a axis. The two cyano-benzene rings are almost perpendicular to each other, with an inter-planar angle of 87.70?(7)°. The dihedral angles between the mean planes of the benzimidazole ring and the two outer benzene rings are 36.27?(16) and 86.70?(16)°. In the crystal structure, mol-ecules are stacked down the a axis with centroid-centroid distances of 3.906?(2)-3.912?(2)?Å and inter-planar distances of 3.5040?(17) and 3.6235?(17)?Å.
Project description:In the title salt, C(18)H(19)N(4)O(+)·PF(6) (-), the dihedral angle between the benzimidazolium and benzimidazole ring systems is 16.24?(2)°. In the cation, a ?-? inter-action is observed between the imidazolium ring and the benzene ring of the benzimidazole ring system [centroid-centroid distance = 3.5713?(11)?Å]. The PF(6) (-) ion is disordered over two sites, with occupancies of 0.895?(2) and 0.105?(2). In the crystal structure, pairs of N-H?N hydrogen bonds link the cations, forming centrosymmetric dimers. The dimers are linked via ?-? inter-actions [centroid-centroid distance = 3.5606?(11)?Å]. In addition, C-H?F hydrogen bonds are observed.
Project description:In the title compound, C14H10Br2O4, the dihedral angle between the aromatic rings is 67.29?(19)°. Both meth-oxy-group C atoms lie close to the plane of their attached ring [deviations = -0.130?(4) and 0.005?(5)?Å]. In the crystal, mol-ecules pack in a centrosymmetric fashion and inter-act via a mixture of weak ?-? stacking inter-actions [centroid-centoid separations = 4.044?(2) and 4.063?(3)?Å], weak C-H?O hydrogen bonding, and Br?Br halogen bonding. This induces a geometry quite different than that predicted by theory.
Project description:The title compound, C(30)H(26)O(2), was prepared by the reaction of a Wittig reagent and 2-methoxy-benzaldehyde. The mol-ecule lies about an inversion centre located at the midpoint of the C-C bond between the inner benzene rings. The crystal structure is stabilized by C-H?? inter-actions.
Project description:The mol-ecule of the title compound, C(14)H(9)N(3), is essentially planar, the dihedral angle formed by the benzimidazole ring system with the benzene ring being 3.87?(3)°. In the crystal packing, mol-ecules are linked into zigzag chains running parallel to the b axis by inter-molecular N-H?N hydrogen-bond inter-actions.