Hongze Liang

3,3′-(2,2′-Bi-1H-imidazole-1,1′-diyl)dipropanol

In the title compound, C12H18N4O2, unlike other unconjugated disubstituted biimidazole derivatives reported so far, the two imidazole rings in a trans conformation exhibit a large planar rotation angle of 51.27 (4)°, and consist of half-molecule asymmetric units related by a twofold rotation. The molecules are linked into a three-dimensional framework with a parallel laminated construction via O—H⋯N and C—H⋯O interactions.

5-tert-Butyl-2-hy­droxy-3-(2-thien­yl)benzaldehyde

In the crystal structure of the title compound, C15H16O2S, the thiophene ring is essentially planar (r.m.s. deviation = 0.006 Å for all non-H atoms) and roughly coplanar with the benzene ring, the dihedral angle between the mean planes of the rings being 4.35 (8)°. An intramolecular O—H⋯O hydrogen bond is observed between the OH group and the aldehyde O atom.

2,2′-(2,2′-Biimidazole-1,1′-di­yl)diethanoic acid

In the title compound, C10H10N4O4, the two imidazole rings adopt a trans conformation and are inclined to one another at a dihedral angle of 55.64 (4)°. In the crystal structure, molecules are linked by intermolecular O—H⋯N hydrogen bonds into chains running parallel to [010] and layers are formed from these by intermolecular C—H⋯O hydrogen bonds. Additional C—H⋯O hydrogen bonds produce a three-dimensional network.

2,5-Dioxopyrrolidin-1-yl 3-(furan-2-yl)acrylate

The title compound, C11H9NO5, was prepared by the reaction of 2-furanacrylic acid and N-hydroxysuccinimide. The molecule consists of two approximately planar moieties, viz. a succinimide group and the rest of the molecule [the largest deviations from the least-squares planes are 0.120 (1) and 0.210 (1) Å, respectively]. The dihedral angle between these fragments is 63.70 (5)°. In the crystal, molecules are linked by C—H⋯O hydrogen bonds into two-dimensional nets.

6-Methyl-pyridine-2(1H)-thione.

There are two unique molecules in the asymmetric unit of the title pyridinethione derivative, C6H7NS, each of which adopts the thione rather than the mercaptan form. The rings in both molecules are essentially planar, with maximum deviations from the least-squares planes through all non-H atoms of 0.021 (2) and 0.017 (2) Å. In the crystal structure, the molecules form centrosymmetric cyclic dimers through intermolecular N—H⋯S hydrogen bonds. Additional C—H(methyl)⋯S interactions generate a three-dimensional network.

6-Methyl-2-pyridyl N-acetyl-1-thio-β-d-glucosa-minide methanol monosolvate.

In the title compound, C14H20N2O5S·CH4O, the pyranose and pyridine rings are linked through an S atom. The pyranose ring has a normal chair conformation. An intramolecular O—H⋯N hydrogen bond occurs. Intermolecular O—H⋯O, N—H⋯O, O—H⋯N and weak C—H⋯O hydrogen bonding is present in the crystal structure.

Erratum: 3,3'-(2,2'-Bi-1H-imidazole-1,1'-di-yl)dipropanamide. Corrigendum.

Corrigendum to Acta Cryst. (2009), E65, o2008.

Bis(μ-2,2'-bi-1H-imidazole-1,1'-di-acet-ato)bis-[diaqua-cobalt(II)] hexa-hydrate.

The dinuclear title compound, [Co2(C10H8N4O4)2(H2O)4]·6H2O, lies about an inversion centre. Each CoII atom is six-coordinated by two water molecules, two carboxylate O atoms and two N atoms of two symmetry-related 2,2′-bi-1H-imidazole-1,1′-diacetate (L 2−) ligands in a slightly distorted octahedral geometry. Molecules are linked into a three-dimensional framework via O—H⋯O and C—H⋯O hydrogen bonds.

Di-tert-butyl 3,3'-(2,2'-bi-1H-imidazole-1,1'-di-yl)dipropanoate.

In the title compound, C20H20N4O4, the complete molecule is generated by a crystallographic centre of symmetry. The conformation is stabilized by two intramolecular C—H⋯N links.

Bis(2,2′-biimidazole-κ2 N,N′)bis­(2-bromo­fumarato-κO)copper(II)

In the title compound, [Cu(C4H2BrO4)2(C6H6N4)2], the central CuII atom lies on an inversion center and is six-coordinated in an octahedral geometry by four N atoms from two chelating biimidazole molecules in the equatorial plane and two O atoms from two 2-bromofumarate ligands in the axial positions. O—H⋯O, N—H⋯O and C—H⋯O hydrogen bonds lead to a three-dimensional network.