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metal-organic compounds
In the crystal structure of the title compound, [Co2(SO4)2(C5H5N)6(H2O)2]·4H2O, the sulfate dianion bridges a (C5H5N)4Co unit to a (C5H5N)2(H2O)2Co unit, forming a chain that runs along the a axis of the monoclinic unit cell. The Co atoms of the units lie on special positions, each of 
site symmetry. Adjacent chains are linked through the uncoordinated water molecules into layers.
site symmetry. Adjacent chains are linked through the uncoordinated water molecules into layers.organic compounds
The molecules of the title compound, C16H16N2O4, are linked by hydrogen bonds into a zigzag chain running along the c axis of the monoclinic cell.
organic compounds
The molecules of the title compound, C14H12N2O3, are linked via hydrogen bonds into a chain running along the shortest axis of the orthorhombic cell.
organic compounds
The molecule of the title compound, C12H10N2O4, is planar and two molecules are stacked over one another at a distance of 3.6 Å. The molecules are linked by hydrogen bonds into a three-dimensional network.
organic compounds
The two independent molecules of the title compound, C12H10N2O3S, are approximately planar and one is stacked over the other. One of the two molecules interacts with its symmetry-related neighbors to form a hydrogen-bonded helical chain that runs along the shortest axis of the orthorhombic unit cell. The second independent molecule does not form such a chain; instead, it is merely linked to the other independent molecule by a hydrogen bond.
organic compounds
Molecules of 5-chlorosalicylaldehyde benzoylhydrazone, C14H11ClN2O2, are linked by an intermolecular amino-carbonyl hydrogen bond into a linear chain that runs along the a axis of the orthorhombic unit cell.
organic compounds
Nearly planar molecules of the title compound, C11H11N3O4, are linked by O—H
O hydrogen bonds to form zigzag chains along the c axis; adjacent chains are, in turn, linked by weaker N—HO hydrogen bonds to form layers perpendicular to the a axis of the orthorhombic unit cell.
O hydrogen bonds to form zigzag chains along the c axis; adjacent chains are, in turn, linked by weaker N—HO hydrogen bonds to form layers perpendicular to the a axis of the orthorhombic unit cell.
