catena‐Poly[[bis­[μ‐2,4‐dichloro‐6‐(2‐pyridyl­methyl­imino­meth­yl)phenolato]dicadmium(II)]‐di‐μ‐thiocyanato]

The title complex, [Cd₂(C₁₃H₉Cl₂N₂O)₂(NCS)₂]_n, is a novel thio­cyanate‐bridged polynuclear cadmium(II) compound. The Cd^II atom is six‐coordinated in a distorted octa­hedral configuration, with one O and two N atoms of one Schiff base mol­ecule and one terminal S atom of a bridging thio­cyanate ligand defining the equatorial plane, and one terminal N atom of another bridging thio­cyanate ligand and one O atom of another Schiff base mol­ecule occupying axial positions. Adjacent inversion‐related [2,4‐dichloro‐6‐(2‐pyridylmethyl­imino­meth­yl)phenolato]cadmium(II) moieties utilize bridging phenolate and thio­cyanate groups to form polymeric chains running along the b axis.     

catena‐Poly[[[2,4‐dichloro‐6‐(pyridin‐2‐ylmethyl­iminomethyl)phenolato]copper(II)]‐μ‐thio­cyanato]

The title complex, [Cu(C₁₃H₉Cl₂N₂O)(NCS)]_n, is a novel thio­cyanate‐bridged polynuclear copper(II) compound. The Cu^II atom is five‐coordinated in a square‐pyramidal configuration, with one O and two N atoms of one Schiff base ligand and one terminal N atom of a bridging thio­cyanate ligand defining the basal plane, and one terminal S atom of another bridging thio­cyanate ligand occupying the axial position. The [2,4‐dichloro‐6‐(pyridin‐2‐ylmethyl­imino­methyl)­phenolato]­copper(II) moieties are linked by the bridging thio­cyanate ligands, forming polymeric chains running along the a axis.     

A novel thio­cyanate‐bridged dinuclear cadmium(II) complex: di‐μ‐thio­cyanato‐bis­((methanol){4‐nitro‐2‐[2‐(dimethyl­amino)ethyl­imino­meth­yl]phenolato}cadmium(II))

The title complex, [Cd₂(C₁₁H₁₄N₃O₃)₂(NCS)₂(CH₄O)₂], is an inter­esting thio­cyanate‐bridged dinuclear cadmium(II) compound. It is located on a crystallographic inversion center. The Cd^II atom is six‐coordinated in an octa­hedral configuration by one O and two N atoms of one Schiff base ligand and by the terminal N atom of a bridging thio­cyanate ligand, defining the basal plane, and by the terminal S atom of another bridging thio­cyanate ligand and by the O atom of a coordi­nated methanol mol­ecule, occupying the axial positions. The mol­ecules are linked through inter­molecular O—H⋯O hydrogen bonds, forming chains running along the b axis.     

catena‐Poly[[{4‐bromo‐2‐[2‐(di­methyl­amino)­ethyl­imino­meth­yl]­phenolato}­copper(II)]‐μ‐thio­cyanato]

The title complex, [Cu(C₁₁H₁₄BrN₂O)(NCS)]_n, is an inter­esting thio­cyanate‐bridged polynuclear copper(II) compound, which crystallizes with two independent mol­ecules in the asymmetric unit. Each Cu^II atom is five‐coordinate in a square‐pyramidal configuration, with one O and two N atoms of one Schiff base ligand and one terminal N atom of a bridging thio­cyanate ligand defining the basal plane, and one terminal S atom of another bridging thio­cyanate ligand occupying the apical position. The {4‐bromo‐2‐[2‐(dimethyl­amino)ethyl­imino­meth­yl]phenolato}copper(II) units are linked by the bridging thio­cyanate ligands, forming polymeric chains running along the a axis. There are weak inter­molecular C—H⋯O and C—H⋯S hydrogen bonds between the chains in the crystal structure.     

A novel dimeric zinc(II) complex: bis­[μ‐1,2‐bis­(1H‐1,2,4‐triazol‐1‐yl)­ethane‐κ2N4:N4′]­bis­[diisothio­cyanato­zinc(II)]

The coordination geometry of the Zn^II atom in the title complex, [Zn₂(NCS)₄(C₆H₈N₆)₂], is that of a distorted tetra­hedron, in which the Zn^II atom is coordinated by four N atoms from the triazole rings of two symmetry‐related 1,2‐bis­(1,2,4‐triazol‐1‐yl)ethane ligands and two thio­cyanate ligands. Two Zn^II atoms are bridged by two organic ligands to form a dimer. The dimer lies about an inversion center.     

Dipotassium di‐μ‐iso­thio­cyanato‐κ4N:S‐bis­[(N‐salicyl­idene‐dl‐valinato‐κ3O,N,O′)­cuprate(II)]

The title compound, K₂[Cu₂(NCS)₂(C₁₂H₁₃NO₃)₂], consists of two K⁺ cations and (N‐salicyl­idene‐d ‐valinato)­cop­per(II) and (N‐salicyl­idene‐l ‐valinato)cop­per(II) coordination units con­nected through three‐atom thio­cyanate (μ‐NCS) bridges into a centrosymmetric dianion. The Cu^II atom adopts a square‐pyramidal coordination, with three donor atoms of the tridentate Schiff base and one N atom of the bridging ligand (μ‐NCS) in the basal plane. The axial position is occupied by the thio­cyanate S atom of a symmetry‐related ligand at an apical distance of 2.9332 (10) Å. Coulombic interactions between six‐coordinated K⁺ ions and the heteroatoms of neighbouring dimeric anions leads to the formation of one‐dimensional chains of mol­ecules parallel to [010]. The superposition of the normals of the pyramidal base planes in a direction close to [001] indicates possible π–π interactions between neighbouring units.     

Bis{μ‐2‐[3‐(cyclo­hexyl­ammonio)­propyl­imino­methyl]­phenolato}bis­[di­chloro­copper(II)]

The title compound, [Cu₂(C₁₆H₂₄N₂O)₂Cl₄], is a dinuclear copper(II) complex with inversion symmetry. Each Cu^II atom is five‐coordinated by two O and one N atom from two Schiff base ligands, and by two Cl atoms, giving an approximately trigonal–bipyramidal coordination environment.     

catena‐Poly[[[4‐bromo‐2‐(2‐pyridyl­methyl­imino­meth­yl)­phenol­ato]­zinc(II)]‐μ‐chloro]

The title complex, [Zn(C₁₃H₁₀BrN₂O)Cl]_n, is a chloride‐bridged polynuclear zinc(II) compound. Each Zn^II ion is five‐coordinated in a square‐pyramidal configuration, with one O and two N atoms of one Schiff base and one bridging Cl atom defining the basal plane, and another bridging Cl atom occupying the apical position. The novelty of the compound lies in the bridging by chlorine of two square‐pyramidal Zn atoms, so that the bridging atom is apical for one Zn ion and basal for the other. This structural arrangement has not been observed before. The linked moieties form polymeric zigzag chains running along the a axis.     

catena‐Poly[[{4‐bromo‐2‐[2‐(dimethyl­amino)ethyl­imino­methyl]­phenol­ato}­copper(II)]‐μ‐azido]

The title complex, [Cu(C₁₁H₁₄BrN₂O)(N₃)]_n, is an inter­esting azide‐bridged polynuclear copper(II) compound. The Cu^II atom is five‐coordinated in a square‐pyramidal configuration, with one O and two N atoms of one Schiff base and one terminal N atom of a bridging azide ligand defining the basal plane, and another terminal N atom of another bridging azide ligand occupying the axial position. The {4‐bromo‐2‐[2‐(dimethyl­amino)ethyl­imino­meth­yl]phenolato}copper(II) moieties are linked by the bridging azide ligands, forming polymeric chains running along the b axis. Adjacent chains are further linked by weak Br⋯Br inter­actions into a sheet.     

Di‐μ‐acetato‐bis­[(2‐acetyl­pyridine thio­semicarbazonato)zinc(II)]

The title compound, [Zn₂(C₂H₃O₂)₂(C₈H₉N₄S)₂], is a centrosymmetric dinuclear mol­ecule with two acetate bridging ligands in a syn–syn arrangement. The Zn^II atom is five‐coordinated in a trigonal–bipyramidal configuration by three thio­semicarbazone atoms (two N and one S) and by an O atom from each of the two acetate groups.     

Bis­[μ‐2‐(1,4,7,10‐tetraoxa‐13‐aza­cyclo­pentadeca‐13‐yl)­cyclo­hepta‐2,4,6‐trien‐1‐one]­bis­[bis­(thio­cyanato)­barium(II)]

In the title complex, [Ba₂(NCS)₄(C₁₇H₂₅NO₅)₂], each Ba²⁺ cation is coordinated by one N atom, four O atoms of the macrocyclic unit, two N atoms of thio­cyanate unit and one O atom from each of the tropone units.     

catena‐Poly[potassium [copper(II)‐μ‐isothiocyanato‐μ‐N‐salicylidene‐β‐alaninato(2–)]]

The title polymeric compound, catena‐poly­[dipotassium [bis­[μ‐N‐salicyl­idene‐β‐alaninato(2−)]‐κ⁴O,N,O′:O′′;κ⁴O′′:O,N,O′‐dicopper(II)]‐di‐μ‐iso­thio­cyanato‐κ²N:S;κ²S:N], {K[Cu(NCS)(C₁₀H₉NO₃)]}_n, consists of [iso­thio­cyanato(N‐salicyl­idene‐β‐alaninato)copper(II)]⁻ anions connected through the two three‐atom thio­cyanate (μ‐NCS) and the two anti,anti‐μ‐­carboxyl­ate bridges into infinite one‐dimensional polymeric anions, with coulombically interacting K⁺ counter‐ions with coordination number 7 constrained between the chains. The Cu^II atoms adopt a distorted tetragonal–bipyramidal coordination, with three donor atoms of the tridentate Schiff base and one N atom of the bridging μ‐NCS ligand in the basal plane. The first axial position is occupied by a thio­cyanate S atom of a symmetry‐related μ‐NCS ligand at an apical distance of 2.9770 (8) Å, and the second position is occupied by an O atom of a bridging carboxyl­ate group from an adjacent coordination unit at a distance of 2.639 (2) Å.     

Dichloro­{2‐[2‐(dimethyl­ammonio)­ethyl­imino­meth­yl]‐4‐nitro­phenolato}­zinc(II) in unsolvated and hemihydrate forms

The two title complexes, [ZnCl₂(C₁₁H₁₅N₃O₃)], (I), and [ZnCl₂(C₁₁H₁₅N₃O₃)]·0.5H₂O, (II), are mononuclear zinc(II) compounds. In both structures, the Zn^II atom is four‐coordinated in a tetra­hedral configuration by one imine N atom and one phenolate O atom of a Schiff base, and by two Cl atoms. The structure of each of the two zinc(II) complex molecules of (II) is similar to that of (I). In (I), the mol­ecules are linked through inter­molecular hydrogen bonds, forming a three‐dimensional framework. In (II), the solvent water mol­ecules are linked to the zinc(II) moieties through inter­molecular O—H⋯O and O—H⋯Cl hydrogen bonds. The mol­ecules in (II) are further linked via other inter­molecular hydrogen bonds, forming a three‐dimensional framework.     

catena‐Poly[[bis(nicotinamide‐κN1)copper(I)]‐μ‐thiocyanato‐κ2N:S]

The Cu^I cations in the title compound, [Cu(NCS)(C₆H₆N₂O)₂]_n, are coordinated by N atoms from each of two mirror‐related nicotin­amide ligands, as well as by one N atom of one thio­cyanate ligand and one S atom of a symmetry‐related thio­cyanate ligand, within a slightly distorted tetrahedron. The Cu^I cations and the thio­cyanate anions are located on a crystallographic mirror plane and the nicotin­amide ligands occupy general positions. The Cu^I cations are connected by the thio­cyanate anions to form chains in the direction of the crystallographic a axis. These chains are connected by hydrogen bonds between the amide H atoms and the O atoms of adjacent nicotin­amide ligands, to give a three‐dimensional structure.     

Di‐μ‐methoxo‐bis({N,N′‐bis­[2‐(3,5‐di­methyl­pyrazol‐1‐yl)­ethyl]­amine‐κ3N}copper(II)) bis­(hexa­fluoro­phosphate)

The title compound, [Cu₂(C₁₄H₂₃N₅)₂(CH₃O)₂](PF₆)₂, has a doubly methoxo‐bridged centrosymmetric copper dimer cation involving two tridentate bis­(pyrazolyl)­amine ligands. The geometry of each Cu^II atom is a distorted square pyramid with two N atoms of the pyrazole in bis­[2‐(3,5‐di­methyl‐1‐pyrazolyl)­ethyl]­amine (bpea) and two μ₂‐bridging O atoms of the methoxo ligands forming the basal plane, and the amine N atom occupying the axial position. In the bridging plane, the Cu—O bond lengths are 1.940 (4) and 1.942 (4) Å, and the bond angles for O—Cu—O and Cu—O—Cu are 76.1 (2) and 103.9 (2)°, respectively. The Cu?Cu distance is 3.058 (1) Å. The central four‐membered ring lies on an inversion centre.     

Di‐μ‐hydroxo‐bis({bis­[2‐(2‐pyridyl)ethyl]amine‐κ3N}copper(II)) dichloride hexahydrate

The title compound, [Cu₂(OH)₂(C₁₄H₁₇N₃)₂]Cl₂·6H₂O, is a crystallographically centrosymmetric dimer of square‐pyramidal Cu^II centres, with a basal–basal [Cu₂(μ‐OH)₂]²⁺ bridging motif and apical pyridyl donors. The Cl⁻ anion is hydrogen bonded to one O—H and one N—H group, and to three different water mol­ecules. Because of disorder, the network of intramolecular hydrogen bonding in the hydrated lattice is only partly resolved.     

μ‐Acetato‐1:2κ2O:O′‐diacetato‐1κ2O,O′;2κO‐bis(di‐2‐pyridylamine)‐1κ2N,N′;2κ2N,N′‐isothiocyanato‐2κN‐dicopper(II)

In the title dinuclear acetate‐bridged complex, [Cu₂(C₂H₃O₂)₃(NCS)(C₁₀H₉N₃)₂], the two Cu atoms are five‐coordinated, with a basal plane consisting of two N atoms of a di‐2‐pyridylamine (dpyam) ligand and two O atoms of two different acetate ligands. The axial positions of these Cu atoms are coordinated to N and O atoms from thio­cyanate and acetate mol­ecules, respectively, leading to a distorted square‐pyramidal geometry with τ values of 0.30 and 0.22. Both Cu^II ions are linked by an acetate group in the equatorial–equatorial positions and have syn–anti bridging configurations. Hydrogen‐bond inter­actions between the amine H atom and the coordinated and uncoordinated O atoms of the acetate anions generate an infinite one‐dimensional chain.     

Bis­[μ‐3{5}‐(2‐pyridyl)­pyrazolido]­bis­[(aceto­nitrile)copper(II)] diperchlorate

The title compound, [Cu₂(C₈H₆N₃)₂(C₂H₃N)₂](ClO₄)₂, con­tains a centrosymmetric dinuclear dication, with square‐pyrami­dal Cu^II centres linked by two 1,2‐pyrazolide bridging groups. There is a weak apical interaction between each Cu ion and a perchlorate O atom.     

A novel three‐dimensional copper(II) coordination polymer with 1,4‐bis(1,2,4‐triazol‐1‐ylmeth­yl)benzene and thio­cyanate

In the title complex, poly[copper(II)‐di‐μ₂‐thio­cyanato‐μ₂‐1,4‐bis­(1,2,4‐triazol‐1‐ylmeth­yl)benzene], [Cu(NCS)₂(C₁₂H₁₂N₆)]_n, the Cu^II atom lies on an inversion centre in a tetra­gonally distorted octa­hedral environment. Four N atoms from thio­cyanate and 1,4‐bis­(1,2,4‐triazol‐1‐ylmeth­yl)benzene (bbtz) ligands fill the equatorial positions, and S atoms from symmetry‐related thio­cyanate ligands fill the axial positions. The benzene ring of the bbtz ligand lies about an inversion centre. Single thio­cyanate bridges link the Cu^II atoms into two‐dimensional sheets containing an unprecedented 16‐membered [Cu₄(μ‐NCS‐N:S)₄] ring. The bbtz ligands further link the two‐dimensional sheets into a three‐dimensional network.     

A novel 8‐carboxyindeno[1,2‐b]quinoxalin‐11‐one thio­semi­carbazone zinc(II) Schiff base complex

In the novel title binuclear zinc(II) Schiff base complex, bis­(μ‐11‐thio­semicarbazonoindeno[1,2‐b]quinoxaline‐8‐carboxylato)bis­[(dimethyl sulfoxide)zinc(II)] dimethyl sulfoxide tri­solvate, [Zn₂(C₁₇H₉N₅O₂S)₂(C₂H₆OS)₂]·3C₂H₆OS, each Zn^II atom is five‐coordinated and situated in a distorted square‐pyramidal environment, coordinated by two L²⁻ ligands and one dimethyl sulfoxide mol­ecule. Each L²⁻ ligand, which coordinates to two Zn^II atoms, has two parts. One part, acting in a tridentate chelating mode, coordinates to one Zn^II atom through two N atoms and one S atom, while another part coordinates to another Zn^II atom through a monodentate carboxylate group. The whole complex has a dimeric structure. The coordination mode of the nearly planar L²⁻ ligand is quite different from the most common mode for Schiff bases.