Sutatip Siripaisarnpipat

catena-Poly[[diaqua­dipyridine­zinc(II)]-μ-succinato]

In the title compound, [Zn(C4H4O4)(C5H5N)2(H2O)2]n, the ZnII ion (site symmetry ) is coordinated in an octahedral geometry by two pyridine molecules, two water molecules and two bridging centrosymmetric O-monodentate succinate dianions to create one-dimensional polymeric chains. The chains are cross-linked by O—H⋯O hydrogen bonds, forming sheets.

3,8-Dimethyl-4,7-diaza-deca-3,7-diene-2,9-dione dioxime.

The complete molecule of the title compound, C10H18N4O2, is generated by a crystallographic inversion centre at the mid-point of the central C—C bond. The two oxime groups have an E configuration. In the crystal, molecules are linked through intermolecular O—H⋯N hydrogen bonds.

1-(2-Bromobenzoyl)-6,7-(methylene-dioxy)isoquinoline.

In the title molecule, C17H10BrNO3, the mean planes of tricycle and bromophenyl fragments form a dihedral angle of 75.5 (1)°. In the crystal, π–π interactions [centroid–centroid distances = 3.556 (2) and 3.898 (8) Å] between the isoquinoline systems link molecules into stacks parallel to the a axis. The crystal packing also exibits weak intermolecular C—H⋯O hydrogen bonds.

Di-μ4-succinato-tetra­kis[aqua­phenanthrolinecopper(II)] tetra­nitrate tetra­hydrate

In the title compound, [Cu4(C4H4O4)2(C12H8N2)4(H2O)4](NO3)4·4H2O, the complete tetracation is generated by crystallographic inversion symmetry. Both unique Cu2+ ions are coordinated by an N,N′-bidentate phenanthroline molecule, two O-monodentate bis-bridging succinate dianions and a water molecule, resulting in distorted CuN2O3 square-based pyramidal geometries for the metal ions, with the water molecule occupying the apical site. In the crystal, the components are linked by O—H⋯O hydrogen bonds and aromatic π–π stacking interactions [minimum centroid–centroid separation = 3.537 (2) Å].