Hong-Xu Guo

Bis(triethano­lamine)nickel(II) sulfate

The title compound, [Ni(C6H15NO3)2]SO4, contains two triethanolamine (TEA) ligands bound to an Ni2+ metal centre, which lies on a crystallographic inversion centre, and one sulfate anion located on a twofold rotation axis such that the asymmetric unit contains one-half molecule of the cation and of the anion. The triethanolamine ligands coordinate via each axial N atom and two of the three O atoms, while the third arm of the ligand has the hydroxyl group pointing away from the metal centre. The sulfate anions are hydrogen bonded to the coordinated hydroxyl groups and also to the free arm, forming a two-dimensional supramolecular hydrogen-bonded network expanding parallel to (010).

Diaqua-(triethano-lamine)copper(II) sulfate monohydrate.

The asymmetric unit of the title compound, [Cu(C6H15NO3)(H2O)2]SO4·H2O, contains a complex cation, a sulfate anion and one uncoordinated water molecule. In the complex cation, the CuII ion is coordinated by five O atoms (three of which are from the triethanolamine ligand and two from coordinated water molecules) and one N atom of the triethanolamine ligand in a typical Jahn–Teller-distorted octahedral geometry. Classical intermolecular O—H⋯O hydrogen bonds link the cation, the sulfate anion and the water molecule into a two-dimensional network.

A novel three-dimensional coordination polymer constructed from pyrazine and copper(I): poly[[copper(I)-di-μ2-pyrazine-κ4N:N′] 3,5-dicarboxybenzenesulfonate monohydrate]

In the title metal-organic framework complex, {[Cu(C(4)H(4)N(2))(2)](C(8)H(5)O(7)S).H(2)O}(n) or {[Cu(I)(pyz)(2)](H(2)SIP).H(2)O}(n) (pyz is pyrazine and H(3)SIP is 5-sulfoisophthalic acid or 3,5-dicarboxybenzenesulfonic acid), the asymmetric unit is composed of one copper(I) center, one whole pyrazine ligand, two half pyrazine ligands lying about inversion centres, one H(2)SIP(-) anion and one lattice water molecule, wherein each Cu(I) atom is in a slightly distorted tetrahedral coordination environment completed by four pyrazine N atoms, with the Cu-N bond lengths in the range 2.017 (3)-2.061 (3) A. The structure features a three-dimensional diamondoid network with one-dimensional channels occupied by H(2)SIP(-) anions and lattice water molecules. Interestingly, the guest-water hydrogen-bonded network is also a diamondoid network, which interpenetrates the metal-pyrazine network.

Bis(μ-2,2′-bipyridin-6-olato)-κ3N,N′:O;κ3O:N,N′-dicopper(I,II) dichlorocuprate(II)

The title compound, [Cu2(C10H7N2O)2][CuCl2], is formulated as containing a mixed-oxidation-state [Cu2(obpy)2]+ cation (Hobpy is 2,2′-bipyridin-6-ol) and a [CuCl2]− anion, both of which lie on inversion centres. The mixed-valence CuI,II is coordinated by one O and two N atoms of two obpy ligands. The Cu⋯Cu interxadaction [2.3805u2005(9)u2005A] results in a square-planar environment for the CuI,II atoms. The CuII atom in the anion is coordinated by two chloride ions in a linear geometry.

(N-Ferrocenylmeth­yl)dimethyl­ammonium chloride dihydrate

In the title compound, [Fe(C5H5)(C8H13N)]Cl·2H2O, Fe—C bond lengths lie in the range 2.020u2005(2)–2.047u2005(2)u2005A. Interxadmolecular N—H⋯Cl, O—H⋯Cl and O—H⋯O hydrogen bonds link the cations, chloride anions and water molxadecules into a three-dimensional hydrogen-bonded network, which stabilizes the crystal packing.

(4-Ethyl-4,4′-bipyridinium-κN4′)triiodo­cadmium(II)

In the title compound, [CdI3(C12H13N2)], the Cd2+ ion is coordinated by three I− ions and by one N atom from an N-ethyl-4,4′-bipyridinium (EP) ligand in a distorted tetraxadhedral arrangement, with Cd—I bond lengths in the range 2.708u2005(1)–2.742u2005(1)u2005A. In the EP ligand, the dihedral angle between the two pyridyl planes is 38.9u2005(4)°.

catena-Poly[[(1,10-phenanthroline-κ2N,N′)cadmium(II)]-di-μ-iodo]

In the title compound, [CdI2(C12H8N2)]n, the CdII ion is six-coordinate and has a distorted octaxadhedral geometry. All the I atoms act as bridging ligands. Adjacent Cd coordination polyhedra share I⋯I edges, thus giving rise to a polymeric chain along the c axis. The CdII ion and the phenanthroline ligand are positioned on a twofold axis.

Bis(μ-biphenyl-2,2'-dicarboxyl-ato)bis-[(2,2'-bipyridine)copper(II)].

The title compound, [Cu2(C14H8O4)2(C10H8N2)2], is a centrosymmetric binuclear copper(II) complex, with a Cu⋯Cu separation of 6.136u2005(16)u2005Å. The Cu atom displays a cis-CuN2O2 square-planar geometry, although two long (> 2.43u2005Å) Cu⋯O contacts complete a distorted cis-CuN2O4 octahedron. Extensive C—H⋯O hydrogen bonds link the molecules into a three-dimensional network.

catena-Poly[[(2,2′-bipyridyl-κ2N,N′)manganese(II)]-di-μ-3,5-dinitro­benzoato-κ4O:O′]

The centrosymmetric formula unit of the title one-dimensional coordination polymer, [Mn(C7H3N2O6)2(C10H8N2)]n, which is twice the asymmetric unit, contains two MnII ions, four 3,5-dinitroxadbenzoate anions and two 2,2′-bipyridine ligands. The 3,5-dinitroxadbenzoate anions connect the MnII atoms through their O atoms, resulting in the formation of a one-dimensional chain structure.

(μ-4,4'-Bipyridine-κN:N')bis-[triaqua-(4,4'-bipyridine-κN)(3-nitro-phthalato-κO)cobalt(II)].

The title binuclear complex, [Co2(C8H3NO6)2(C10H8N2)3(H2O)6], has been synthesized hydrothermally from 3-nitrophthalic acid (H2NPA), Co(NO3)2·6H2O and 4,4′-bipyridine (4,4′-bipy). The molecule of the complex occupies a special position on an inversion centre. The CoII atom has a slightly distorted octahedral environment formed by two N atoms from two 4,4′-bipy ligands, one carboxylate O atom from NPA, and three O atoms of water molecules. An extensive O—H⋯O and N—H⋯O hydrogen-bonding system links molecules of the complex into a three-dimensional network.