Ruirui Yun

Synthesis, Crystal Structure and Spectra Properties of the Nickel (II) Complex with 1,3-bis(1-benzylbenzimidazol2-yl)-2-Oxopropane

A novel complex of nickel (II) picrate with V-shaped ligand 1,3-bis(1-benzylbenzimidazol-2-yl)-2-oxopropane (Bobb) was synthesized and characterized by elemental analyses and electrical conductivity, IR and UV/visible spectra. The crystal structure of the complex has been determined by the single-crystal X-ray diffraction. In the complex, the Ni (II) ion is six-coordinated with a N4O2 ligand set, resulting in a distorted octahedron.

1,3-Bis(1-benzyl-1H-benzimidazol-2-yl)-2-oxapropane

In the title compound, C30H26N4O, the dihedral angle between the two benzimidazole rings is 69.35 (9)°. The dihedral angles between the benzimidazole ring system and the phenyl ring are 76.79 (12) and 86.10 (11)° in the two benzylbenzimidazole moieties.

Bis[1,3-bis­(1-benzyl-1H-benzimidazol-2-yl)-2-oxapropane]zinc(II) dipicrate dimethyl­formamide disolvate

In the title compound, [Zn(C30H26N4O)2](C6H2N3O7)2·2C3H7NO, the ZnII ion is coordinated in a distorted octahedral environment involving four equatorial N atoms and two O atoms in axial sites. The dihedral angles between the benzimidazole ring system and the phenyl rings in each of the benzylbenzimidazole units are 78.56 (12), 81.68 (11), 75.76 (10) and 85.78 (9)°. In the crystal structure, there are weak but significant intermolecular π–π stacking interactions with centroid–centroid distances of 3.685 (1) and 3.978 (1) Å.

Studies on Copper(II), Cobalt (II) and Nickel (II) Picrate Complexes with the Ligand 1,3-Bis(2-benzimidazyl)- 2-thiapropane

Three new six-coordinate transition metal (Cu, Co, Ni) complexes of ligand 1,3-bis(2-benzimidazyl) -2-thiapropane (L), with compositions [M(L) 2 ](pic) 2 · nH 2 O, (M = Cu, Co, Ni; n = 2, 0.5, 2), were synthesized and characterized by elemental analyses, electrical conductivities, IR, and UV-visible measurements. Cyclic voltammograms of copper complex indicates a quasireversible Cu 2 + /Cu + couple. Possible structures of these complexes have been proposed.

Bis[1,3-bis­(1-benzyl-1H-benzimidazol-2-yl)-2-oxapropane]nickel(II) dipicrate–dimethyl­formamide–ethanol (1/2/0.25)

In the title compound, [Ni(C30H26N4O)2](C6H2N3O7)2·2C3H7NO·0.25CH3CH2OH, the NiII ion is coordinated in a distorted octahedral environment by four N atoms and two O atoms from two tridendate 1,3-bis(1-benzyl-1H-benzimidazol-2-yl)-2-oxapropane ligands. The crystal structure is stabilized by weak intermolecular C—H⋯O hydrogen bonds and weak π–π stacking interactions [centroid–centroid distance 3.501 (3) Å]. As well as the cation, two anions and two dimethylformamide solvent molecules, the asymmetric unit also contains an ethanol solvent molecule with 0.25 occupancy.

Bis[1,3-bis-(benzimidazol-2-yl)-2-oxa-propane]cobalt(II) dipicrate acetonitrile tris-olvate.

In the title compound, [Co(C16H14N4O)2](C6H2N3O7)2·3CH3CN, the CoII ion is located on a crystallographic twofold rotation axis and is coordinated in a slightly distorted tetrahedral environment by four N atoms from the two bidentate N-heterocycles. The crystal structure is stabilized by intermolecular N—H⋯O and N—H⋯N hydrogen bonds. One of the acetonitrile solvent molecules also lies on a twofold rotation axis.

Synthesis, Crystal Structure and Electrochemical Properties of the Copper(Π) Complex with 1,3-bis(benzimidazol-2-yl)-2-oxopropane

A novel complex of Cu(pic)2 with V-shaped ligand 1,3-bis(benzimidazol-2-yl)-2-o- xopropane (OBB) was synthesized and characterized by elemental analyses and electrical conductivity, IR, UV/visible and 1H-n.m.r. spectra. The crystal structure of the complex has been determined by the single-crystal X-ray diffraction. In the complex, the Cu(Π) ion is six-coordinated with a N4O2 ligand set, resulting in a distorted octahedron.

2,6-Bis(1H-benzimidazol­-2-yl)pyridine methanol trisolvate

In the title compound, C19H13N5·3CH4O, the 2,6-bis(2-benzimidazolyl)pyridine molecule is essentially planar with an r.m.s. deviation for all non-H atoms of 0.185 Å. The crystal structure is stabilized by intermolecular O—H⋯O, O—H⋯N and N—H⋯O hydrogen bonds and weak π⋯π stacking interactions with centroid–centroid distances of 3.6675 (16) and 3.6891 (15) Å. The atoms of one of the methanol solvent molecules are disordered over two sites with refined occupancies of 0.606(8) and 0.394(8).

Studies on Zinc(II) Perchlorate Complex with Tripod Ligand Tris(N-methylbenzimidazol-2-ylmethyl)Amine and Salicylate

A novel five-coordinate zinc(II) complex with the tripod ligand tris(N-methylbenzimidazol-2-ylmethyl)amine (Mentb) and salicylate, with the composition [Zn(Mentb)(salicylate)](ClO4) · 1.5DMF, was synthesized and characterized by means of elemental analyses, electrical conductivities, thermal analyses, i.r., u.v. and 1H-n.m.r. spectra. The crystal structure of the complex has been determined by a single-crystal X-ray diffraction method, and shows that the Zn II atom is bonded to a tris(N-methylbenzimidazol-2-ylmethyl)amine (Mentb) ligand and a salicylate molecule through four N atoms and one O atom, giving a distorted trigonal-bipyramidal coordination geometry [τ(Zn) = 0.78], with approximate C 3 molecular symmetry.

Bis[bis-(1-ethyl-benzimidazol-2-ylmeth-yl) ether]cobalt(II) dipicrate dimethyl-formamide disolvate.

In the title complex, [Co(C20H22N4O)2](C6H2N3O7)2·2C3H7NO, the CoII ion is coordinated by two sets of two N atoms and an O atom from two independent tridendate ligands in a distorted octahedral coordination environment. There are significant differences between chemically equivalent coordination bond lengths. The crystal structure is stabilized by weak intermolecular C—H⋯O hydrogen bonds and weak π–π stacking interactions [centroid–centroid distance 3.495 (1) Å]. In one of the anions one nitro group is rotationally disordered about the C—N bond with refined occupancies of 0.524 (8) and 0.476 (8).