[4′-(2-Pyridyl)-2,2′:6′,2′′-ter­pyridine-κ³N,N′,N′′]isothio­cyanato­copper(II) thio­cyanate

In the title compound, [Cu(NCS)(C₂₀H₁₄N₄)]SCN, the Cu atom is four-coordinated by a tridentate chelating 4′-(2-pyridyl)-2,2′:6′,2′′-ter­pyridine ligand and one isothio­cyanate group in a square-planar coordination geometry. The sum of angles around the Cu^II center is 359.1°.

catena-Poly[[[(4'-phenyl-2,2':6',2''-terpyridine-κ³N)­copper(II)]-μ-terephthalato-κ²O:O′] terephthalic acid]

The title compound, [Cu(C₈H₄O₄)(C₂₁H₁₅N₃)]·C₈H₆O₄, consists of polymeric chains in which the terpyridine heterocycle chelates to the Cu atom in an N,N′,N′′-tridentate manner; the Cu atoms are also covalently bonded through the two singly-bonded carboxyl O atoms of the dicarboxyl­ate dianions to give rise to a chain structure. An additional terephthalic acid molecule is hydrogen bonded to the chains. The asymmetric unit contains halves of two different half-molecule terephthalate ions; in each case, the complete ions are generated by inversion symmetry.

catena-Poly[[[(4′-phenyl-2,2′:6′,2′′-terpyridine-κ³N,N′,N′′)zinc(II)]-μ-terephthalato-κ²O:O′] monohydrate]

The title compound, {[Zn(C₈H₄O₄)(C₂₁H₁₅N₃)]·H₂O}_n, is a one-dimensional polymeric complex bridged by centrosymmetric dicarboxyl­ate dianions. Each Zn atom is five-coordinate, bonded to two carboxyl O atoms from the dicarboxyl­ate dianions and to three N atoms from the heterocycle, which chelates to the Zn atom in a κ³N,N′,N′′ manner.

Bis­[μ-4′-(2-pyridyl)-2,2′:6′,2′′-ter­pyridine]­disilver(I) bis­(hexa­fluoro­phosphate)

The Ag atoms and the ligands of the dication in the title compound, [Ag₂(C₂₀H₁₄N₄)₂](PF₆)₂, are disordered; the dication lies on a center of symmetry. The major component is chelated by two N atoms of the heterocycle and is coordinated by the N atom of the pyridyl substituent of the other heterocycle; the geometry is trigonal planar distorted towards tetrahedral owing to a weak Ag...F interaction. The minor component is chelated by three N atoms and is also coordinated by the N atom of the pyridyl substituent of the inversion-related heterocycle; its geometry is octahedral owing to two Ag...F interactions. One anion lies on a special position of site symmetry 2 and the other on a special position of site symmetry . The disorder in the centrosymmetric dication is best described in terms of the Ag atom being disordered over two sites and the C₅H₂N ring of the heterocycle being rotated by about 180°; the two dications are superimposed in the crystal structure.

Di­chloro­bis­(pheno­thia­zine-κS)­palladium(II)

In the title complex, [PdCl₂(C₁₂H₉NS)₂], the Pd atom lies on a center of inversion and is coordinated by two chloride anions and two S atoms from two pheno­thia­zine ligands, forming a square-planar PdCl₂S₂ geometry. In the crystal structure, a one-dimensional polymer structure is constructed via N—H...Cl and N—H...N hydrogen bonds.

Di-μ-iodo-bis­[(1,10-phenanthroline-κ²N,N′)copper(I)] aceto­nitrile solvate

In the title complex, [Cu₂I₂(C₁₂H₈N₂)₂]·C₂H₃N, two Cu^I atoms are bridged by two I atoms and each Cu^I atom is chelated by a 1,10-phenanthroline ligand to give four-coordinate tetrahedral geometry.

Diaqua­dithio­cyanato­copper(II)

The Cu atom in the title compound, [Cu(NCS)₂(H₂O)₂], exists in a trans-N₂O₂Cu square-planar geometry and the mol­ecule lies on a crystallographic mirror plane. A weak inter­molecular Cu...S inter­action of 3.0185 (2) Å is also observed.

Retracted: Poly[diaqua­di-μ₃-malonato-μ-pyrazine-dinickel(II)]

The title compound, [Ni₂(C₃H₂O₄)₂(C₄H₄N₂)(H₂O)₂]_n, has been prepared from the hydro­thermal reaction of nickel(II) chloride, malonic acid and pyrazine. The Ni^II atoms are linked via coordinated malonates, forming a two-dimensional network with cavities of 6.14 × 5.60 Å. These sheet structures are further connected into a three-dimensional network by bridging pyrazine ligands which have inversion symmetry, the mean distance between the layers being 7.39 Å. The coordination geometry around the Ni^II atom is a tetra­gonally elongated octa­hedron, with pyrazine N and aqua O atoms at the apical positions.