Bis[2-(2-pyridylmethyl-amino)ethane-sulfonato-κN,N',O]zinc(II).

The title mononuclear complex, [Zn(C(8)H(11)N(2)O(3)S)(2)], is a zinc salt of 2-(2-pyridylmethyl-amino)ethane-sulfonic acid (Hpmt). The Zn(II) ion is located on an inversion centre and is octahedrally surrounded by four N and two O atoms. The deprotonated pmt(-) anion coordinates in a facial arrangement through its two N atoms and one of the sulfonate O atoms. The crystal packing is determined by inter-molecular N-H⋯O and C-H⋯O hydrogen bonds.

2-(2-Furylmethyl-ammonio)ethane-sulfonate methanol solvate.

The organic mol-ecule of the title compound, C(7)H(11)NO(4)S·CH(3)OH, is a zwitterion and its furan ring displays positional disorder [occupancy 0.563 (5):0.437 (5)]. The crystal structure is extended into a three-dimensional supra-molecular architecture through inter-molecular O-H⋯O and N-H⋯O hydrogen bonds with participation of the methanol solvent mol-ecules.

3,3'-Di-tert-butyl-5,5'-dimethoxy-biphenyl-2,2'-diol.

The title compound, C(22)H(30)O(4), displays twofold rotational symmetry. The two benzene rings are almost perpendicular to each other, forming a dihedral angle of 89.8 (6)°. In the crystal, mol-ecules are linked into an extended one-dimensional chain structure via inter-molecular O-H⋯O hydrogen bonds.

catena-Poly[[diaqua-nickel(II)]-bis-(µ-pyridine-4-sulfinato)-κN,O;κO,N].

In the title coordination polymer, [Ni(C(5)H(4)NO(2)S)(2)(H(2)O)(2)](n), the Ni(II) ion is located on an inversion centre and is octa-hedrally coordinated by two N and two O atoms of four symmetry-related and deprotonated pyridine-4-sulfinate (ps) ligands together with two water mol-ecules in axial positions. The ps(-) anions, acting as µ(2)-bridging ligands, link neighbouring Ni(II) ions into a chain structure along the c axis. These polymeric chains are extended into a three-dimensional framework via inter-molecular O-H⋯O hydrogen bonds with participation of the water mol-ecules.

Poly[bis-[µ(2)-2-(2-pyridylmethyl-amino)ethanesulfonato]cadmium(II)].

The title compound [Cd(C(8)H(11)N(2)O(3)S)(2)](n), is a two-dimensional coordination polymer based on a Cd(2+) atom and deprotonated 2-(2-pyridylmethyl-amino)ethanesulfonic acid (Hpmt). The complex has mol-ecular symmetry C(i) as a consequence of the Cd(II) being located on an inversion centre. Two N atoms of each pmt(-) ligand coordinate to the Cd(2+) ion and its sulfonate O atom bonds to an adjacent Cd(2+) ion. 24-membered (-Cd-N-C-C-S-O-)(4) rings are formed between neighbouring Cd(2+) ions; these are inter-connected, forming a two-dimensional layer structure. In respect to stereogenic amino N atom and the inversion symmetry of the complex, the compound is a 1:1 racemate. The crystal packing is stabilized by inter-molecular N-H⋯O hydrogen bonds and further connected by π-π stacking inter-actions between the pyridyl rings [average inter-planar distance and centroid-centroid separation = 3.582 (1) and 3.634 (1)Å, respectively], forming a three-dimensional supra-molecular architecture.

4,4'-(Propane-1,3-di-yl)dipyridinium tetra-chloridonickelate(II).

The title compound, (C(13)H(16)N(2))[NiCl(4)] or (H(2)bpp)·NiCl(4) [bpp is 1,3-bis-(4-pyrid-yl)propane], is isostructural with its already reported Cu, Zn and Hg analogues. The structure consists of a doubly charged (H(2)bpp)(2+) cation and a tetra-hedral [NiCl(4)](2-) dianion. Both pyridyl N atoms are protonated and form a (H(2)bpp)(2+) cation which adopts an anti-anti conformation with a dihedral angle of 6.287 (7)° between the pyridyl rings. The two pyridyl N atoms are both involved in strong N-H⋯Cl hydrogen bonds, which link both units into a dimer.

Poly[[diaqua(µ(2)-4,4'-dipyridyl sulfide-κN:N')(4,4'-dipyridyl sulfide-κN)(2-hydroxy-5-sulfonatobenzoato-κO)nickel(II)] dihydrate].

The asymmetric unit of the title helical coordination polymer, {[Ni(C(7)H(4)O(6)S)(C(10)H(8)N(2)S)(2)(H(2)O)(2)]·2H(2)O}(n), is comprised of an Ni(II) ion, one 5-sulfosalicylic acid dianion (HSSA), two 4,4'-dipyridylsulfide (4,4'-dps) ligands, and two coordinated and two uncoordinated water mol-ecules. The Ni(II) ion is coordinated by two water mol-ecules, one carboxyl-ate O atom of the HSSA dianion and three N atoms from three 4,4'-dps ligands in a distorted octa-hedral environment. Half of the 4,4'-dps ligands are µ(2)-bridging ligands which link adjacent Ni(II) centers, forming a one-dimensional helical structure along the b axis. This helical structure is further stabilized by O-H⋯O intra- and inter-molecular hydrogen bonds.

catena-Poly[[[diaqua-manganese(II)]-µ(3)-pyridine-2,3-dicarboxyl-ato-κN,O:O:O] dihydrate].

In the title coordination polymer, {[Mn(C(7)H(3)NO(4))(H(2)O)(2)]·2H(2)O}(n), the Mn(II) ion is coordinated in a distorted octahedral environment by the O atoms of two water mol-ecules, one N and one O atoms of the chelating pyridine-2,3-dicarboxyl-ate (PDC) dianion, and two axial bridging carboxyl-ate O atoms from two adjacent PDC ligands. The fully deprotonated PDC anion acts a µ(3)-bridging ligand, establishing a chain structure along the a axis. These polymeric chains are connected into a three-dimensional framework via several inter-molecular O-H⋯O hydrogen bonds.

4-(4-Carb-oxy-1,3-thia-zol-2-yl)pyridinium 3-carb-oxy-4-hydroxy-benzene-sulfonate dihydrate.

In the crystal structure of the title compound, C(9)H(7)N(2)O(2)S(+)·C(7)H(5)O(6)S(-)·2H(2)O, an H atom from the 5-sulfosalicylic acid is transferred to the pyridyl N atom, forming a salt. The dihedral angle between the thiazole and pyridinium rings is 5.909 (5)°. The crystal packing is determined by O-H⋯O and N-H⋯O hydrogen bonds involving water mol-ecules.

Di-µ-chlorido-bis-{[2-(2-pyridylmethyl-amino)ethanesulfonato-κN,N',O]copper(II)}.

In the title compound, [Cu(2)(C(8)H(11)N(2)O(3)S)(2)Cl(2)], the Cu atoms are five-coordinated in a distorted square-pyramidal geometry by three donor atoms of the deprotonated anionic 2-(2-pyridylmethyl-amino)ethanesulfonate (pmt) ligand and two Cl atoms. The Cl atoms bridge two Cu atoms, giving a binuclear structure; the centroid of the Cu(2)Cl(2) ring lies on a crystallographic center of inversion. The complex is stabilized by hydrogen bonds and π-π stacking inter-actions [average inter-planar distance = 3.4969 (1) Šand ring-centroid separation distance = 4.1068 (4) Å].