metal-organic compounds
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In the crystal structure of the title complex, [YbCl2(C18H15N5)(CH3OH)2]Cl, the pseudo-pentagonal–bipyramidal coordination geometry of the YbIII cation is composed of three N atoms from one cis-(±)-2,4,5-tris(pyridin-2-yl)imidazoline (HL) ligand, two O atoms from two methanol molecules and two Cl− anions. Chains are formed along [010] through N—HCl, O—HCl and O—HN hydrogen bonds.
metal-organic compounds
Open access
The binuclear title compound, [Cu2(CH3CO2)4(C6H5NO)], is located about a center of inversion. The CuII atoms are connected [Cu—Cu = 2.6134 (5) Å] and bridged by four acetate ligands. Their distorted octahedral coordination geometry is completed by a terminal pyridine N atom of a 3-pyridincarboxaldehyde ligand. In the crystal, the complex molecules are linked by C—HO hydrogen bonds, forming two-dimensional networks lying parallel to the ab plane. These networks are linked via C—HO hydrogen bonds involving inversion-related 3-pyridinecarboxaldehyde ligands, forming a three dimensional supramolecular architecture.
organic compounds
Open access
The title 2:1 co-crystal, 2C12H10N2·C8H6O4, crystallizes with one molecule of 4-[(E)-2-(pyridin-2-yl)ethenyl]pyridine (A) and one half-molecule of terephthalic acid (B) in the asymmetric unit. In the crystal, the components are linked through heterodimeric COOHNpyridine synthons, forming linear aggregates of composition –A–B–A–B–. Further linkage through weak C—HO and C—Hπ interactions gives two-dimensional hydrogen-bonded undulating sheets propagating in the [100] and [010] directions. These layers are connected through additional weak C—HO contacts, forming a three-dimensional structure.