Triaqua[2,2′-(propane-1,3-diyl)bis(5-carboxy-1H-imidazole-4-carboxylato-κ²N³,O⁴)]calcium(II) tetrahydrate

In the title compound, [Ca(C₁₃H₁₀N₄O₈)(H₂O)₃]·4H₂O, the Ca^II ion is hepta-coordinated by two N atoms and two O atoms from a tetra­dentate 1,3-bis-(1H-imidazole-4,5-dicarb­oxy­l­ate) propane dianion and three water O atoms, giving a distorted penta­gonal–bipyramidal coordination environment. The Ca—O bond lengths are in the range 2.354 (3)–2.453 (2) Å, while the Ca—N bond lengths are in the range 2.523 (2)–2.548 (2) Å. An intra­molecular O—H...O hydrogen bond between the carb­oxy and carboxyl­ate groups stabilizes the mol­ecular configuration. A three-dimensional network of N—H...O and O—H...O hydrogen bonds help to stabilize the crystal packing.

Trichlorido[4-meth­oxy-2,6-bis­(2-pyrimidin-2-yl-κN)phenyl-κC¹]platinum(IV) acetonitrile monosolvate

In the title complex, [Pt(C₁₅H₁₁N₄O)Cl₃]·CH₃CN, the Pt^IV ion adopts a distorted octa­hedral coordination geometry defined by a tridentate cyclo­metalated NCN ligand and three Cl atoms. In the crystal, individual mol­ecules are aggregated into a three-dimensional network by C—H...Cl hydrogen-bonding inter­actions and π–π stacking inter­actions between the tridentate ligands, the shortest ring centroid–centroid distance being 3.613 Å.

3,6-Di-tert-butyl-9-(quinolin-6-yl)-9H-carbazole

In the title compound, C₂₉H₃₀N₂, the dihedral angle between the mean planes of the carbazole and the quinoline systems is 52.41 (6)°. Mol­ecules are linked into dimers by pairs of inter­molecular C—H...N hydrogen bonds and into a three-dimensional network by C—H...π inter­actions.