Poly[[tris­(μ₂-acetato-κ²O:O′)(4-chloro­benzene-1,2-di­amine-κN)(μ₃-hydroxido)dizinc] ethanol monosolvate]

The title compound, {[Zn₂(CH₃CO₂)₃(OH)(C₆H₇ClN₂)]·C₂H₅OH}_n, has alternating octa­hedrally and tetra­hedrally coordinated Zn²⁺ ions. The octa­hedral coordination sphere is composed of one N atom of the monodentate di­amino­chloro­benzene ligand, three acetate O atoms and two bridging hydroxide ligands. The tetra­hedral coordination sphere consists of three acetate O atoms and the hydroxide ligand. The zinc ions are bridged by acetate and hydroxide ligands. The result is a laddered-chain structure parallel to [100] with ethanol solvent mol­ecules occupying the space between the chains. The di­amine ligand chlorine substitutent is disordered over two equally populated positions as a result of a crystallographically imposed inversion center between adjacent ligands. The ethanol solvent mol­ecule exhibits disorder with the two components having refined occupancies of 0.696 (11) and 0.304 (11). O—H...O hydrogen bonds form between the hydroxide ligand and the ethanol solvent mol­ecule. N—H...O and N—H...N hydrogen bonding between the uncoordinated amine group and the acetate ligands and the coordinated amine group are also observed.

5,6-Dimethyl-2-(pyridin-2-yl)-1-[(pyri­din-2-yl)meth­yl]-1H-benzimidazole

The title compound, C₂₀H₁₈N₄, was obtained via the condensation of 4,5-di­methyl­benzene-1,2-di­amine with pyridine-2-carbaldehyde. The plane of the 2-(pyridin-2-yl) substitutent is canted by 2.75 (11)° from the plane of the benzimidazole system. The mol­ecule exhibits an S(6) C—H...N intra­molecular hydrogen-bond motif. In the crystal, C—H...N hydrogen bonds link pairs of mol­ecules related by a crystallographic inversion center, forming R₂²(20) rings. Additional weak C—H...N hydrogen bonds result in C(9) chains parallel to [001].

4-Bromo-2-(5-bromo­thio­phen-2-yl)-1-[(5-bromo­thio­phen-2-yl)meth­yl]-5,6-dimethyl-1H-benzimidazole

The title compound, C₁₈H₁₃Br₃N₂S₂, was obtained via the reaction of N-bromo­succinamide with 5,6-dimethyl-2-(thio­phen-2-yl)-1-[(thio­phen-2-yl)meth­yl]-1H-benzimidazole. The compound exhibits rotational disorder of the 5-bromo­thio­phen-2-yl substituent with a refined major:minor occupancy ratio of 0.876 (7):0.124 (7). The 5-bromo­thio­phen-2-yl mean plane is canted to the benzimidazole plane by 20.0 (4) and 21 (4)° in the major and minor components, respectively. In the crystal, weak C—H...N inter­actions link the mol­ecules into infinite C(7) chains along the 2₁ axes.

5,6-Dimethyl-2-(5-methyl­thio­phen-2-yl)-1-[(5-methyl­thio­phen-2-yl)meth­yl]-1H-benzimidazole

The title mol­ecule, C₂₀H₂₀N₂S₂, is T-shaped and consists of a nearly flat 5,6-dimethyl-2-(5-methyl­thio­phen-2-yl)benzimidazole system approximately perpendicular to the 5-methyl­thio­phen-2-ylmethyl substituent. The 5,6-dimethyl-2-(5-meth­yl­thio­phen-2-yl)benzimidazole system is rotationally disordered about the two imidazole N atoms as approximated by a twofold rotation axis with a refined major/minor occupancy ratio of 0.884 (2):0.116 (2). The benzimidazole ring system is essentially planar, the largest deviations being 0.026 (2) and 0.044 (18) Å in the major and minor components, respectively. The inter­planar angles between the benzimidazole unit and the 5-methyl­thio­phen-2-yl substituent are 10.8 (3) and 8(3)° in the major and minor components, respectively, and the corresponding angles with the 5-methyl­thio­phen-2-ylmethyl substituent are 88.12 (8) and 89.5 (4)°. In the crystal, mol­ecules are oriented with their 2-(5-methyl­thio­phen-2-yl)benzimidazole mean planes approximately parallel to (11-3 and appear to be held together by π–π [2-thiophene...imidazole centroid–centroid distance = 4.1383 (7) Å] and C—H...π contacts. A weak C—H...N hydrogen bond generates infinite chains parallel to [100].