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In the title compound, [Co(C19H12N5)2], each CoII atom occupies a position of high site symmetry, 222, and is coordinated by the six N atoms [Co—N = 2.085 (4)–2.157 (3) Å] from two tridentate 2-[6-(1 H-benzimidazol-2-yl)-2-pyrid­yl]­benz­imi­dazol­ide ligands in a distorted octa­hedral geometry. [ABSTRACT FROM AUTHOR]

The asymmetric unit of the title compound, C7H6Br2O2·0.5H2O, contains two independent 3,5-dibromo­salicyl alcohol mol­ecules and one water mol­ecule. The salicyl alcohol mol­ecules inter­act with each other and with the water mol­ecule through O—H⋯O hydrogen bonding, giving rise to a layer structure. [ABSTRACT FROM AUTHOR]

The title compound, [Zn(NO3)(C8H8N2O)2]NO3·H2O, consists of a tris-chelated zinc cation and a nitrate anion, along with an uncoordinated water mol­ecule. These inter­act through O—H⋯O and N—H⋯O hydrogen bonds, giving rise to a three-dimensional network structure. The ZnII ion has an octa­hedral coordination. [ABSTRACT FROM AUTHOR]

The two chromen-3-yl substituents at the 2- and 3-positions of the 1,4-dihydroxy­benzene in the title dimethyl­formamide (DMF) tris­olvate, C24H14O10·3C3H7NO, are aligned at 67.1 (1) and 69.8 (1)° with respect to the central aromatic ring. The 1-hydr­oxy group serves as a hydrogen-bond donor to a DMF whereas the substituent at the 3-position functions as a hydrogen-bond donor to two DMF mol­ecules. The other three hydr­oxy groups inter­act with donor sites of adjacent mol­ecules, generating a three-dimensional network architecture. [ABSTRACT FROM AUTHOR]

In the title compound, C16H11NO3, the quinolin-8-yl­oxy and 2-carboxy­phenyl groups are linked through an ether O atom, the angle at this atom being 116.4 (1)° in one mol­ecule and 114.8 (1)° in the other independent mol­ecule. In both mol­ecules, the carboxylic acid group inter­acts with the heterocyclic moiety through an intra­molecular hydrogen bond. [ABSTRACT FROM AUTHOR]

In the crystal structure of the title compound, C16H16N4O22+·2NO3−, the cation, which lies on a twofold rotation axis, inter­acts with the nitrate anions, giving rise to a hydrogen-bonded layer structure. [ABSTRACT FROM AUTHOR]