In the title complex, [Ag(2)(C(12)H(8)N(2)O(4))(C(14)H(14)N(4))](n), one Ag(I) ion, lying on a twofold rotation axis, is coordinated by two N atoms from two 3,5,9,11-tetra-oxo-4,10-diaza-tetra-cyclo-[5.5.2.0(2,6).0(8,12)]tetra-dec-13-ene-4,10-diide (L) ligands in a nearly linear arrangement. The other Ag(I) ion, lying on an inversion center, is coordinated by two O atoms from two L ligands and ...

In the title compound, C(6)H(16)N(4)O(4)·4H(2)O, the tetra-zinane mol-ecule lies across an inversion centre. The tetra-zinane ring adopts a chair conformation, and all imino H atoms occupy axial positions. In the crystal, adjacent mol-ecules are linked through O-H⋯O, O-H⋯N and N-H⋯O hydrogen bonds with water mol-ecules generating a three-dimensional network.

The water soluble porphyrin tetrakis(4-N-methylpyridyl)porphine (H2TMpyP) and its copper(II) derivative (CuTMpyP) convert Z-poly(dG-dC) to the B-form. For H2TMpyP, the fraction Z character (fr-Z) is given by fr-Z = 1.0 - 21 rO and for CuTMpyP, fr-Z = .94 - 12 rO where rO identical to [Porphyrin]O/[DNA]O. Neither the manganese(III) derivative of of this porphyrin (MnTMpyP) nor tetrakis(2-N-methy...

The title compound, [Cu(NCS)(C(12)H(8)N(6))](n), is a self-assembled two-dimensional metal-organic network. The Cu atom is linked by two N atoms from two 3,6-di-4-pyridyl-1,2,4,5-tetra-zine ligands and by the N and S atoms from two thio-cyanate ligands in a distorted tetra-hedral environment. The Cu atom and the thio-cyanate ligand occupy a crystallographic mirror plane m, and a crystallographi...

The asymmetric unit of the title compound, C(6)H(5)N(5)·C(9)H(6)O(6), comprises a full mol-ecule each of neutral trimesic acid (tma) and zwitterionic 5-(pyridin-1-ium-3-yl)-5H-1,2,3,4-tetra-zol-5-ide (ptz). The components are linked into a two-dimensional layer by a combination of O-H⋯O, O-H⋯N, N-H⋯O and N-H⋯N hydrogen bonds parallel to the (10[Formula: see text]) plane. Layers comprising alter...

The asymmetric unit of the title complex salt, [Cr(C10H24N4)(NH3)2][ZnCl4]Cl·H2O, is comprised of four halves of the Cr(III) complex cations (the counterparts being generated by application of inversion symmetry), two tetra-chlorido-zincate anions, two chloride anions and two water mol-ecules. Each Cr(III) ion is coordinated by the four N atoms of the cyclam (1,4,8,11-tetra-aza-cyclo-tetra-deca...

In the title compound, [Cu(NO(3))(2)(C(14)H(36)N(6))](NO(3))(2)·4H(2)O, the Cu(II) atom, lying on an inversion center, is six-coordinated in a distorted octa-hedral environment by four N atoms from a centrosymmetric 14-membered tetra-aza-cyclo-tetra-decane macrocyclic ligand and two O atoms from two nitrate anions. The supra-molecular network is consolidated by extensive O-H⋯O and N-H⋯O hydroge...

In the title compound, [Cu(C(8)F(4)O(4))(C(5)H(5)N)(3)](n), the Cu(II) atom, lying on a twofold rotation axis, is five-coordinated by two O atoms from two tetra-fluoro-terephthalate ligands and three N atoms from three pyridine ligands in a distorted trigonal-bipyramidal geometry. Adjacent Cu(II) atoms are connected via the bridging tetra-fluoro-terephthalate ligands into a one-dimensional chai...

In the title coordination polymer, [Zn(C(8)H(4)O(4))(C(5)H(5)N)(2)](n), the Zn(II) atom, located on a twofold rotation axis, is tetra-coordinated by two monodentate O atoms from two different carboxyl-ate groups and two pyridyl N atoms, forming a distorted tetra-hedral geometry. The Zn(II) atoms are bridged by terephthalate ligands, generating an infinite zigzag chain along [101].