metal-organic compounds
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In the title compound, K3[Cu(C10H12N2O10P)]·2H2O, the CuII ion, one potassium cation and a P atom are situated on a twofold rotation axis. The CuII ion is coordinated by two N and four O atoms from one bis{[bis(carboxylatomethyl)amino]methyl}phosphinate ligand in a distorted octahedral coordination geometry. The two crystallographically independent potassium ions exhibit different coordination environments. The potassium ion in a general position is heptacoordinated by five carboxylate O atoms, one phosphinate O atom and one water molecule [K—O = 2.718 (3)–3.040 (3) Å], and the potassium ion situated on the twofold rotation axis is hexacoordinated by four carboxylate O atoms and two water molecules [K—O = 2.618 (3)–2.771 (3) Å]. The water molecules are also involved in formation of intermolecular O—HO hydrogen bonds.
metal-organic compounds
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In the cation of the title salt, [Ag(C12H6N2O2)2](C7H3N2O7), the AgI atom is coordinated in a distorted tetrahedral geometry by four N atoms from two 1,10-phenanthroline-5,6-dione ligands, while the 3,5-dinitrosalicylate anion has only a short contact [2.847 (6) Å] between one of its O atoms and the AgI atom. The dihedral angle between the two 1,10-phenanthroline-5,6-dione ligands is 58.4 (1)°. There is an intramolecular O—HO hydrogen bond in the 3,5-dinitrosalicylate anion.
organic compounds
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In the crystal structure of the title compound, C18H13N5·H2O, adjacent molecules are linked by O—HN and N—HO hydrogen bonds, generating a chain propagating along [001].
organic compounds
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In the title compound, C16H21N3O3, the piperazine ring adopts a chair conformation, with its N—C bonds in pseudo-equatorial orientations. In the crystal, molecules are linked by O—HN hydrogen bonds, generating C(5) chains propagating in [101]. Weak aromatic π–π stacking interactions also occur [centroid–centroid separation = 3.899 (1) Å].