In the title complex, [ZnCl(2)(C(10)H(9)NO(4))(2)], the Zn(II) ion lies on a twofold rotation axis and is four-coordinated by two carboxyl-ate O atoms from two 3-(2-carboxy-ethen-yl)pyridinium-1-acetate ligands in a monodentate mode and two Cl atoms in a distorted tetra-hedral geometry. In the crystal structure, inter-molecular O-H⋯O hydrogen bonds link the mol-ecules into a double-chain struct...

In the molecule of the centrosymmetric title compound, [Co(C(25)H(20)N(2)O(5))(2)(H(2)O)(4)](ClO(4))(2)·6H(2)O, the Co atom is octa-hedrally coordinated by four water mol-ecules lying in the equatorial plane and two monodentate carboxyl-ate groups from two dicarboxylate ligands. The crystal structure involves O-H⋯O and O-H⋯Cl hydrogen bonds..

C(CH3)5(+) is the first reported example of a five-coordinate carbon atom bound only to separate (that is, monodentate) carbon ligands. This species illustrate the limits of carbon bonding, exhibiting Lewis-violating "electron-deficient bonds" between the hypercoordinate carbon and its methyl groups. Though not kinetically persistent under standard laboratory conditions, its dissociation activa...

In the mononuclear title complex, [CoBr(2)(C(5)H(8)N(2))(2)], the Co(II) atom is coordinated by two N atoms from two monodentate 3,5-dimethyl-pyrazole ligands and two Br atoms in a highly distorted tetra-hedral geometry. In the crystal, the complex mol-ecules are linked by inter-molecular N-H⋯Br hydrogen bonds into chains along [101]. An intra-molecular N-H⋯Br hydrogen bond is also present.

In the title compound, [Mn(NO(3))(2)(C(7)H(9)NO)(2)], the Mn(II) atom (site symmetry 2) is coordinated by two N,O-bidentate (2-amino-phen-yl)methanol ligands and two monodentate nitrate anions in a distorted cis-MnN(2)O(4) octa-hedral coordination geometry. In the crystal, N-H⋯O, O-H⋯O and C-H⋯O hydrogen bonds help to establish the packing.

The structure of the title compound, (C(14)H(16)N)(2)[HgCl(2)(SO(4))], consists of an infinite chain propagating along the c direction, containing Hg(II) ions tetra-coordinated by two bridging O atoms of bis-monodentate sulfate anions and two chloride ligands. In the the crystal, N-H⋯O hydrogen bonding between the cations and the anionic chains consolidates the packing. The crystal structure wa...

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].

In the title centrosymmetric dinuclear complex, [Eu(2)(CH(3)CO(2))(6)(C(12)H(8)N(2))(2)], the Eu(III) atom is nine-coordinated by two N atoms from a 1,10-phenanthroline ligand and seven O atoms from five acetate ligands (two bidentate, three monodentate). The crystal structure is stabilized by π-π stacking inter-actions between the pyridine and benzene rings of adjacent mol-ecules, with a centr...

In the title compound, [Mg(C3H3N2)4(H2O)2]Cl2, the Mg(II) cation lies on a crystallographic inversion centre and is coordinated by two water mol-ecules and four N-atom donors from monodentate imidazole ligands, giving a slightly distorted octa-hedral stereochemistry. In the crystal, water O-H⋯Cl and imidazole N-H⋯Cl hydrogen bonds give rise to a three-dimensional structure.

In the title compound, [Mn(C(10)H(7)N(6))(2)(H(2)O)(4)]·2H(2)O, the Mn(2+) lies on a twofold rotation axis and is six-coordinated by two N atoms from the cis-related monodentate 5-[4-(imidazol-1-yl)phen-yl]tetra-zolide ligands and four O atoms from the coordinated water mol-ecules. The complex mol-ecules are connected via water O-H⋯O and O-H⋯N hydrogen bonds and weak π-π stacking inter-actions ...