Di­aqua­(sulfato‐κO)[2,4,6‐tris(2‐pyridyl)‐1,3,5‐triazine‐κ3N1,N2,N6]zinc(II) dihydrate

In the title compound, [Zn(SO₄)(C₁₈H₁₂N₆)(H₂O)₂]·2H₂O, the metal complex is monomeric, with an octahedral Zn^II centre coordinated by the tridentate ligand 2,4,6‐tris(2‐pyridyl)‐1,3,5‐triazine (tpt), two aqua mol­ecules and a monodentate sulfate ion. A complex hydrogen‐bonding scheme is built up out of the profuse availability of donors and acceptors (O—H⋯O/N and C—H⋯O) which, in addition to π–π interactions between tpt groups, define a three‐dimensional assembly.     

catena‐Poly[[aqua­(3,4,7,8‐tetra­methyl‐1,10‐phenanthroline‐κ2N,N′)cadmium(II)]‐μ3‐thio­sulfato‐κ3S:S:O]

The title compound, [Cd(S₂O₃)(C₁₆H₁₆N₂)(H₂O)]_n, presents a polymeric one‐dimensional structure running along the P2₁/c glide direction, with elementary units defined by six‐coordinate Cd^II atoms bonded to three symmetry‐related thio­sulfate groups, a bidentate tetra­methyl­phenanthroline ligand and one aqua ligand. The bridging thio­sulfates bind metal centers through two different sequences, viz. Cd—S—Cd′ and Cd′—S′—S′—O′—Cd, defining a closed six‐membered ring. Individual chains are held together viaπ–π inter­actions to generate two‐dimensional networks parallel to the (100) plane. These, in turn, are connected by much weaker van der Waals inter­actions.     

Di‐μ2‐sulfito‐κ8O,O′:O′,O′′‐bis[(2,4,6‐tri‐2‐pyrid­yl‐1,3,5‐triazine‐κ3N2,N1,N6)cadmium(II)] octa­hydrate

The title compound, [Cd₂(SO₃)₂(C₁₈H₁₂N₆)₂]·8H₂O, is a dimer built up around a symmetry center, where the sulfite anion displays a so far unreported coordination mode in metal‐organic complexes; the anion binds as a μ₂‐sulfite‐κ⁴O,O′:O′,O′′ ligand to two symmetry‐related seven‐coordinate Cd^II cations, binding through its three O atoms by way of two chelate bites with an O atom in common, which acts as a bridge. The cation coordination is completed by a 2,4,6‐tri‐2‐pyridyl‐1,3,5‐triazine ligand acting in its usual tridentate mode.     

catena‐Poly­[[bis­(thio­cyanato‐κN)cadmium(II)]‐di‐μ‐thio­urea‐κ4S:S]

The Cd^II ion in the title complex, [Cd(SCN)₂{SC(NH₂)₂}₂]_∞, is situated at a centre of symmetry, and is bound to two N atoms belonging to thio­cyanate groups and to four S atoms of bridging thio­urea ligands. The structure consists of infinite chains of slightly distorted edge‐shared Cd‐centred octahedra. The bridging S atoms of two thio­urea ligands comprise the common edge. Some thermal properties are described.     

[2,6‐Bis(1H‐benzimidazol‐2‐yl‐κN3)­pyridine‐κN](di­methyl­form­amide‐κO)­(thio­sulfato‐κ2O,S)­nickel(II) mono­hydrate

The structure of the title compound, [Ni(ths)(bbip)(dmf)]·­H₂O [ths is thio­sulfate, S₂O₃; bbip is 2,6‐bis(1H‐benz­imidazol‐2‐yl)­pyridine, C₂₁H₁₃N₅; and dmf is di­methyl­form­amide, C₃H₇NO], is monomeric, with the nickel ion octahe­drally surrounded by an N,N′,N′′‐tridentate bbip mol­ecule, an S,O‐bidentate ths mol­ecule and an O‐monodentate dmf mol­ecule. The H atoms of the hydration water mol­ecule and the amino groups of bbip are involved in hydrogen bonding and determine a spatial organization of broad layers parallel to (001), which are connected by weak interactions.     

trans‐Bis(isothiocyanato‐κN)bis(methanol‐κO)bis[2,4,6‐tri(4‐pyridyl)‐1,3,5‐triazine‐κN2]manganese(II)

The title compound, [Mn(NCS)₂(C₁₈H₁₂N₆)₂(CH₄O)₂], con­tains a centrosymmetric octahedral Mn^II centre and three pairs of trans‐coordinating ligands. It is the first example of a mononuclear metal complex with the 2,4,6‐tri(4‐pyridyl)‐1,3,5‐triazine (tpt) ligand. Intermolecular π–π stacking of the planar tpt ligands, as well as hydrogen bonds between pyridyl N and methanol H atoms, results in the formation of a three‐dimensional network.     

Bis­(azido‐κN)[(6R,7S,8S,14S)‐(–)‐sparteine‐κ2N,N′]copper(II)

In the title compound, [Cu(N₃)₂(C₁₅H₂₆N₂)], the chiral alkaloid (−)‐l‐sparteine (Sp) acts as a bidentate ligand, with two azide ligands occupying the remaining coordination sites, forming a distorted CuN₄ tetrahedron. The dihedral angle between the N_Sp—Cu—N_Sp and N_azide—Cu—N_azide planes is 55.3 (2)°. Principal dimensions include Cu—N_Sp = 2.011 (6) and 2.025 (5) Å, and Cu—N_azide = 1.939 (6) and 1.934 (7) Å. The mid‐point of the N_Sp⋯N_Sp line does not lie exactly in the N_azide—Cu—N_azide plane, but is tilted towards one of the N_Sp atoms by 0.026 Å.     

(2,2′‐Bi­pyridine‐κ2N)­bis­[N‐(2‐pyridyl‐κN)‐p‐toluene­sulfon­amido‐κN]zinc(II)

The structure of the title compound, [Zn(C₁₂­H₁₁­N₂­O₂S)₂(C₁₀H₈N₂)], consists of monomeric mol­ecules in which the central ZnN₂N′N′′ unit has a distorted tetrahedral geometry, with bond lengths ranging from 2.020 (3) to 2.109 (3) Å. The anionic ligands are potential bidentate donors and thus there are two secondary Zn—N interactions. The shorter of these is 2.317 (3) Å and completes at the Zn atom an irregular five‐coordinated geometry, which can be described as a square pyramid showing 30% distortion towards the trigonal bipyramid; the other Zn—N contact is much longer at 2.549 (3) Å.     

Iodo­(picolinato‐κ2N,O)(picolinic acid‐κ2N,O)mercury(II)

The title compound, [Hg(C₆H₄NO₂)I(C₆H₅NO₂)], has twofold symmetry along the Hg—I bond. The Hg^II ion coordinates one I atom [at 2.6045 (4) Å], two N and two O atoms [at 2.298 (3) and 2.481 (2) Å] from one picolinate ion, and one picolinic acid mol­ecule in a very irregular trigonal–bipyramidal coordination. The single hydr­oxy H atom required for chemical neutrality is both statistically (by crystal symmetry) and structurally disordered, and is involved in an inter­molecular O—H⋯O hydrogen bond [O⋯O = 2.455 (4) Å], connecting the mol­ecules into one‐dimensional infinite chains along the [101] direction.     

catena‐Poly[[bis[5‐(4‐pyridyl‐κN)‐2‐(2‐pyridylmethylsulfanyl)‐1,3,4‐oxadiazole]cadmium(II)]‐di‐μ‐thiocyanato‐κ2N:S;κ2S:N]

The title compound, [Cd(NCS)₂(C₁₃H₁₀N₄OS)₂]_n, contains SCN⁻ anions acting as end‐to‐end bridging ligands which utilize both S and N atoms to link cadmium(II) centers into one‐dimensional double chains. The multidentate 5‐(4‐pyridyl)‐2‐(2‐pyridylmethylsulfanyl)‐1,3,4‐oxadiazole ligands behave as monodentate terminal ligands, binding metal centers only through the N atoms of the 4‐pyridyl groups. Two types of eight‐membered rings are formed by two SCN⁻ anions bridging Cd^II centers, viz. planar and chair conformation, which are alternately disposed along the same chain. Finally, chains define a two‐dimensional array through two different interchain π–π stacking interactions.     

(Acetato‐κO)[tris(3,5‐dimethylpyrazol‐1‐yl‐κN2)hydroborato]zinc(II)

The title complex, [Zn(C₁₅H₂₂BN₆)(C₂H₃O₂)] or (Tp^Me,Me)Zn(OAc), contains a tripodal tris(pyrazolyl)hydroborate ligand, a monodentate acetate ligand and a Zn^II centre in a distorted tetrahedral coordination environment capped on one triangular face by a secondary Zn...O interaction with the second O atom of the acetate ligand. The four‐coordination of Zn^II and the essentially monodentate character of the acetate ligand are due to the high steric demands of the ligand set, which prevent chelate formation and five‐coordination and lead to relatively long Zn—O and Zn—N bonds compared with related complexes of Zn^II and other metals.     

Bis(1,3,5‐triazine‐2,4,6‐triamine‐κN1)silver(I) nitrate

The title compound, [Ag(C₃H₆N₆)₂]NO₃, has an alternating two‐dimensional bilayer structure supported by extensive hydrogen bonds. The [Ag(melamine)₂]⁺ cationic monomers (melamine is 1,3,5‐triazine‐2,4,6‐triamine) are connected via N—H...N hydrogen bonds to form two‐dimensional sheets. Nitrate groups are sandwiched between two sheets through N—H...O hydrogen bonds. An almost perfectly linear coordination geometry is found for the Ag^I ions. The triazine ligands are slightly distorted due to π–π interactions.     

[5‐Benzyl‐3‐phenyl‐2‐(2‐pyridyl‐κN)thiazolidin‐4‐one‐κS]dichloropalladium(II)

The palladium(II) centre in the title compound, [PdCl₂(C₂₁H₁₈N₂OS)], is coordinated to the pyridyl N atom and to the thia­zolidinone S atom of the 5‐benzyl‐3‐phenyl‐2‐(2‐pyridyl)­thia­zolidin‐4‐one ligand, resulting in a five‐membered chelate ring. Two cis‐chloro ligands complete the square‐planar coordination environment of the metal. Although the geometry at the Pd centre is essentially planar, the N—Pd—S bite angle of 85.20 (8)° causes deviations in the cis angles from the ideal value of 90°. Opposite enantiomers form one‐dimensional chains in the cell via a short S?O intermolecular interaction.     

(Nitro‐κN)[2‐(phenyldiazenyl‐κN2)pyridine‐κN](2,2′:6′,2′′‐terpyridine‐κ3N)ruthenium(II) tetrafluoroborate

The Ru—N bond distances in the title complex, [Ru(NO₂)(C₁₁H₉N₃)(C₁₅H₁₁N₃)]BF₄ or [Ru(NO₂)(tpy)(azpy)]BF₄, [tpy is 2,2′:6′,2′′‐ter­pyridine and azpy is 2‐(phenyl­azo)­pyridine], are Ru—N_py 2.063 (4), Ru—N_azo 2.036 (4), Ru—N_nitro 2.066 (3) Å, and Ru—N_tpy 2.082 (4), 1.982 (3) and 2.074 (4) Å. The azo N atom is trans to the nitro group. The azo N=N bond length is 1.265 (5) Å, which is the shortest found in such complexes to date. This indicates a multiple bond between Ru and the N atom of the nitro group, and π‐­backbonding [dπ(Ru) π*(azo)] is decreased.     

Aqua­bis(2‐nitro­benzoato‐κO)(1,10‐phenanthroline‐κ2N,N′)­zinc(II)

The title compound, [Zn(C₇H₄NO₄)₂(C₁₂H₈N₂)(H₂O)], has been synthesized. X‐Ray analysis reveals that it is a neutral zinc(II) mononuclear carboxyl­ate complex based on mixed N‐ and O‐donor ligands. The Zn atom is five‐coordinate in a distorted trigonal–bipyramidal coordination environment involving two O atoms of two monodentate 2‐nitro­benzoate mol­ecules, two N atoms of a 1,10‐phenanthroline mol­ecule and one O atom of a water mol­ecule. The axial positions are occupied by a carboxyl­ate O atom from the 2‐nitro­benzoate ligand and an N atom from the 1,10‐phenanthroline ligand [N—Zn—O = 167.66 (9)°].     

trans‐(2‐Acetylpyridine‐κ2N,O)dichlorobis(dimethyl sulfoxide‐κS)ruthenium(II)

In the title complex, [RuCl₂(C₇H₇NO)(C₂H₆OS)₂], the metal ion is at the centre of a distorted octahedral NOCl₂S₂ coordination sphere. The neutral 2‐acetyl­pyridine ligand binds to the metal ion through the pyridine N and carbonyl O atoms, forming a five‐membered chelate ring. The monodentate S‐coordinating di­methyl sulfoxide mol­ecules are mutually cis, and the two remaining positions in the coordination sphere are occupied by two mutually trans Cl^? ions.     

Di­thio­cyanatobis­[4,4,5,5‐tetra­methyl‐2‐(4‐pyridyl‐κN)‐1H‐imidazoline‐1‐oxyl]­zinc(II)

In the title compound, [Zn(NCS)₂(C₁₂H₁₆N₃O)₂], the Zn^II ion has a distorted tetrahedral coordination. It is bonded to two thio­cyanate and two pyridyl N atoms. The metal ion and the two thio­cyanate ligands lie on a mirror plane with the Zn—N_py and average Zn—N_NCS bond distances being 2.036 (2) and 1.931 (4) Å, respectively     

Bis[1‐(pyridin‐2‐yl)­ethano­ne‐κN 4‐phenyl­thio­semicarbazonato‐κ2N4,S]­manganese(II)

One half of the mol­ecule of the title complex, [Mn(C₁₄H₁₃N₄S)₂], is related to the other half by a twofold axis passing through the Mn atom. This high‐spin Mn atom is six‐coordinated, in an octahedral geometry, by the azomethine N, the pyridyl N and the thiol­ate S atom of two planar 1‐­(pyridin‐2‐yl)­ethanone N(4)‐phenyl­thio­semicarbazone lig­ands. In the crystal, the mol­ecules are interconnected by N—­H?S and C—H?N interactions, forming a three‐dimensional network.     

Aqua­chloro(1,10‐phenanthroline‐κ2N,N′)(p‐toluenesulfonato‐κO)copper(II)

In the title compound, [CuCl(C₇H₇O₃S)(C₁₂H₈N₂)(H₂O)], the central Cu atom is coordinated by a water mol­ecule, a chloride ion, an O‐monodentate p‐toluene­sulfonate anion and an N,N′‐bidentate 1,10‐phenanthroline ligand. The copper environment is best described as a slightly distorted square pyramid, with bond distances Cu—Cl 2.2282 (9) Å, Cu—OW 1.984 (3) Å, and Cu—N 2.006 (3) and 2.028 (3) Å; the apical Cu—O distance is 2.281 (2) Å. In the supramolecular structure, π–π‐stacking stabilization is observed, and classical and non‐classical hydrogen bonds also play an important role.