Yan-Yan Sun

Tetra­aqua­bis{2-[4-(3-pyrid­yl)pyrimidin-2-ylsulfan­yl]acetato}manganese(II) dihydrate

In the title compound, [Mn(C11H8N3O2S)2(H2O)4]·2H2O, the MnII ion lies on an inversion centre and is coordinated by four water molecules in equatorial positions and two N atoms from two 2-[4-(3-pyridyl)pyrimidin-2-ylsulfanyl]acetate ligands in the axial positions. The water molecules, including the uncoordinated water molecules, and the acetate O atoms are involved in O—H⋯O and O—H⋯N hydrogen-bonding interactions, which link the components into layers parallel to the a (b + c) plane.

Tris(ethyl­enediamine)zinc(II) dichloride monohydrate

The asymmetric unit of the title compound, [Zn(C(2)H(8)N(2))(3)]Cl(2)·H(2)O, contains a discrete [Zn(C(2)H(8)N(2))(3)](2+) cation with a distorted octa-hedral geometry around Zn, two uncoordinated chloride ions and one water mol-ecule. The crystal structure exhibits N-H⋯O, N-H⋯Cl and O-H⋯O hydrogen bonds.

catena-Poly[[triaqua­zinc(II)]-μ-1H-1,2,4-triazole-3,5-dicarboxyl­ato]

In the title compound, [Zn(C4HN3O4)(H2O)3]n, each ZnII atom adopts a distorted octahedral coordination geometry, being surrounded by one chelating and one monodentate 1H-1,2,4-triazole-3,5-dicarboxylate ligand and three water molecules. Adjacent ZnII cations are linked by a 1H-1,2,4-triazole-3,5-dicarboxylate ligand in a μ2,κ3 fashion to form a chain running along the c axis. The crystal packing is stabilized by N—H⋯O, O—H⋯N and O—H⋯O hydrogen bonds.

1,3-Bis[4-(4-pyrid­yl)pyrimidin-2-ylsulfan­yl]propane

In the title compound, C21H18N6S2, the dihedral angles between the aromatic rings in the two 4-(4-pyridyl)pyrimidine residues are 23.45 (13) and 2.67 (14)°. Whereas one of the C—S—C—C torsion angles corresponds to a staggered conformation, the other is gauche.

catena-Poly[bis­[(1,10-phenanthroline)iron(II)]-bis­(μ-5-carboxy­benzene-1,3-dicarboxyl­ato)]

The asymmetric unit of the title compound, [Fe(C9H4O6)(C12H8N2)(H2O)]n, contains one FeII cation, one 5-carboxybenzene-1,3-dicarboxylate dianion (Hbtc), one 1,10-phenanthroline (phen) ligand and one water molecule. The FeII centre displays a distorted octahedral geometry, being surrounded by one phen ligand, two μ2-O atoms of two carboxylate groups from two Hbtc ligands, one O atom from one carboxylate of another Hbtc ligand and one terminal water molecule. One carboxylate group ligates two FeII cations in a μ1,1 mode, while the other carboxylate groups bonds to only one Fe atom. The crystal structure is stabilized by O—H⋯O hydrogen bonds.

catena-Poly[manganese(II)-(μ2-3,5-di-2-pyridyl-1,2,4-triazol­ato)-μ2-formato]

Owing to the presence of crystallographic twofold rotation axes (site symmetry 2, Wyckoff letters e and f), the asymmetric unit of the title compound, [Mn(C12H8N5)(CHO2)]n, contains one-half of an MnII cation, one-half of a bpt anion (Hbpt is 3,5-di-2-pyridyl-4H-1,2,4-triazole) and one-half of a formate anion. The bpt and formate ligands occupy the same C 2 symmetry, while the MnII ion resides on another crystallographic twofold rotation axis. Each bpt ligand acts as a cis-bis-chelate to ligate two MnII ions into a one-dimensional chain running along the crystallographic 41 screw axis. Adjacent MnII ions are further bridged by a μ2-formate ligand, completing the distorted octahedral coordination geometry of the cation.

catena-Poly[[(1,10-phenanthroline)cadmium(II)]-μ-2-(1,3-benzimidazol-2-ylsulfan-yl)acetato-κN,O:N].

In title compound, [Cd(C9H6N2O2S)(C12H8N2)]n, the CdII atom is in a distorted tetragonal-pyramidal environment, coordinated by one chelating 1,10-phenanthroline ligand, one chelating 2-(1,3-benzimidazol-2-ylsulfanyl)acetate (bia) ligand bound through one N atom and one O atom of the carboxyl group, and one N atom from a second bia ligand. Each bia ligand acts as bridge between CdII ions, forming one-dimensional coordination polymers along [010], with a shortest Cd⋯Cd distance of 4.27 (2) Å.

Bis[2-(benzimidazol-2-ylsulfan-yl)acetato]bis-(2,2'-bipyridine)cadmium(II).

In the structure of the title compound, [Cd(C9H7N2O2S)2(C10H8N2)2], the complex molecules are located on a crystallographic twofold rotation axis and the CdII ion is octahedrally coordinated by two chelating 2,2′-bipyridine ligands and two O atoms from the carboxylate groups of two 2-(benzimidazol-2-ylsulfanyl)acetate ligands. The two carboxylate ligands adopt a cis configuration with respect to each other. Within each of these ligands, the imidazole fragments are bent back in a loop towards the acetyl groups, forming intramolecular N—H⋯O hydrogen bonds, which help to stablilize the mononuclear complex. Adjacent molecules are further linked by weak C—H⋯O hydrogen bonds, resulting in a chain along the c axis.

Bis[μ-1,3-bis(4,5-dihydroimidazol-2-yl)benzene-κ2N:N′]bis[dichloridozinc(II)] N,N′-dimethylformamide disolvate

The title compound, [Zn2Cl4(C12H14N4)2]·2C3H7NO, is located on a centre of inversion with one half of a complex molecule and one dimethylformamide solvent molecule in the asymmetric unit. The ZnII ion is tetrahedrally coordinated by two organic ligands and two chloride ions. Each organic ligand acts as a bidentate ligand, connecting two ZnII ions, resulting in a dimeric [2:2] metallamacrocyclic structure. Adjacent molecules are further linked by N—H⋯Cl hydrogen bonds and the solvent is linked to the complex by N—H⋯O hydrogen bonds.

4-Amino-3,5-dimethyl-4H1-,2,4-triazole–water (2/3)

The asymmetric unit of the title compound, 2C4H8N4·3H2O, contains two crystallographically independent 4-amino-3,5-dimethyl-1,2,4-triazole molecules and three water molecules. The structure exhibits N—H⋯O, O—H⋯N and O—H⋯O hydrogen bonds.