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1.  catena-Poly[[[diaqua­(tetra­methyl­ethylenediamine-κ2 N,N′)nickel(II)]-μ-sulfato-κ2 O:O′] monohydrate] 
The title compound, {[Ni(SO4)(C6H16N2)(H2O)2]·H2O}n, contains a NiII atom that is coordinated nearly octa­hedrally by a chelating tetra­ethyl­enediamine (tmeda) ligand, two water mol­ecules in a cis arrangement and two O atoms of two sulfate anions in a trans arrangement. The sulfate anions act as μ2-bridging ligands leading to a chain structure of alternating NiO4N2 octa­hedra and SO4 tetra­hedra parallel to [001]. The polymeric chains are linked by O—H⋯O hydrogen bonds between coordinating water mol­ecules and sulfate anions to give double strands. There is a lattice water mol­ecule which is also involved in O—H⋯O hydrogen bonding between adjacent [Ni(SO4)(tmeda)(H2O)2] chains.
PMCID: PMC3629479  PMID: 23633997
2.  catena-Poly[(μ-anilido)(μ-1,2-dimeth­oxy­ethane-κ3-O,O′:O)sodium] 
In the title compound, [Na(C6H5NH)(C4H10O2)], the Na+ cation is coordinated by the N atoms of two anilide anions, two O atoms of a chelating 1,2-dimeth­oxy­ethane (dme) ligand and one O atom of an adjacent dme ligand. The coordination polyhedron around Na+ corresponds to a distorted square pyramid with the N atoms of the anilide groups and the O atoms of the chelating dme unit at the base and a third O atom at the apical position. The anilide anions act as μ-bridging ligands and the 1,2-dimeth­oxy­ethane mol­ecules display a μ2-κ3-O,O′ coordination mode. As a result of this connectivity, a polymeric chain structure parallel to [100] is formed, consisting of Na2O2 and Na2N2 four-membered rings. It should be noted that the remaining H atom of the anilide NH group is not involved in hydrogen bonding.
PMCID: PMC3470181  PMID: 23125625
3.  catena-Poly[[tricarbonyl-1κ3 C-(1η5-cyclo­penta­dien­yl)lead(II)molyb­denum(0)](Mo—Pb)-μ3-acetato-2′:2:2′′κ4 O:O,O′:O′] 
In the title compound, [MoPb(C5H5)(CH3COO)(CO)3], the PbII atom is coordinated pyramidally via the Mo0 atom of a {Cp(CO)3Mo} (Cp = cyclo­penta­dien­yl) fragment [Pb—Mo = 3.0589 (5) Å] and a chelating acetate (Ac) group. Additionally, the [{Cp(CO)3Mo}PbAc] units are linked along [100] by Pb—O(acetate) inter­actions, giving a ladder-type polymeric structure composed of PbCO2 and Pb2O2 four-membered rings. The {Cp(CO)3Mo} units attached to the PbII atom occupy terminal positions at opposite sides of the slightly puckered lead acetate chain. The angle between the Pb—Mo bond vector and the central chain plane is 67.8 (2)°.
PMCID: PMC3393150  PMID: 22807718
4.  Hydrogen 4-ammonio­phenyl­phospho­n­ate 
The title compound, C6H8NO3P, is isostructural with p-arsanilic acid. It exists as the zwitterion H3N+C6H4PO3H−. In the crystal, mol­ecules are linked by O—H⋯O and N—H⋯O hydrogen-bond bridges, giving a three-dimensional network structure. The strongest hydrogen bonds are formed between adjacent PO3H groups with O⋯O distances of 2.577 (2) Å.
PMCID: PMC3274954  PMID: 22346907
5.  Bis(hydrogen l-glutamato)palladium(II) 
In the title compound, [Pd(C5H8NO4)2], the Pd(II) atom is coordinated by two O atoms and two N atoms of two N,O-chelating hydrogen l-glutatmate ligands in a square–planar geometry with the N and O atoms in a mutually trans arrangement. The complex units are embedded in a network of N—H⋯O and O—H⋯O hydrogen-bonding inter­actions that stabilize the three-dimensional crystal structure. The strongest hydrogen bonds are formed between the γ-COOH untis of adjacent glutamate ligands, leading to dimers of the type R 2 2(8) with O⋯O separations of 2.640 (6) Å.
PMCID: PMC3201544  PMID: 22065700
6.  (1,4,7,10-Tetra­aza­cyclo­dodecane-κ4 N 1,N 4,N 7,N 10)(tetra­oxidomolybdato-κO)copper(II) monohydrate 
In the title compound, [CuMoO4(C8H20N4)]·H2O, the CuII atom is coordinated by four N atoms of the 1,4,7,10-tetra­aza­cyclo­dodecane (cyclen) ligand and one O atom of the molybdate unit in a distorted square-pyramidal environment. The water mol­ecules are linked to the complex unit to form centrosymmetric dimers [R 4 4(12) and R 4 4(16)] and discrete D 3 2(9), D 3 3(11) and D 3 3(13) chains by O—H⋯O and N—H⋯O inter­actions. Additionally, the complex mol­ecules are linked into C 4 4(18) chain motifs by N—H⋯O inter­actions. As a result [(cyclen)CuMoO4] units and water molecules are linked to layers that are oriented parallel to the ac plane. The stacking of the layers in the b-axis direction is supported by weak C—H⋯O hydrogen bridges.
PMCID: PMC3007245  PMID: 21588138
7.  Tetra­carbonyl-1κ2 C,3κ2 C-bis[1,3(η5)-cyclo­penta­dien­yl]dihydroxido-2κ2 O-diirontin(2 Fe—Sn) monohydrate 
In the title hydrate, [Fe2Sn(C5H5)2(OH)2(CO)4]·H2O, the central Sn atom is tetra­hedrally coordinated by two {Cp(CO)2Fe} fragments and two hydroxide groups. The [{Cp(CO)2Fe}2Sn(OH)2] and water mol­ecules are linked by O—H⋯O hydrogen bridges, giving two-dimensional arrays with 4.82 topology that stack along the c axis.
PMCID: PMC3006954  PMID: 21587729
8.  N,N′-Dicyclo­hexyl­ethyl­enediammonium dichloride 
In the title compound, C14H30N2 2+·2Cl−, the N,N′-dicyclo­hexyl­ethyl­enediammonium cation posseses crystallographic symmetry, and thus the compound crystallizes with two formula units per unit cell. In the crystal, the cations and anions are linked by N—H⋯Cl hydrogen bonds, giving a two-dimensional network with {6,3} topology.
PMCID: PMC2980107  PMID: 21580012

Results 1-8 (8)