Bis(acesulfamato‐κO4)diaqua­bis­(3‐methyl­pyridine‐κN)nickel(II)

In the crystal structure of the title compound [systematic name: diaqua­bis(6‐methyl‐2,2‐dioxo‐1,2,3‐oxathia­zin‐4‐olato‐κO⁴)bis­(3‐methyl­pyridine‐κN)nickel(II)], [Ni(C₄H₄NO₄S)₂(C₆H₇N)₂(H₂O)₂], the Ni^II centre resides on a centre of symmetry and has a distorted octa­hedral geometry. The basal plane is formed by two carbonyl O atoms of two monodentate trans‐oriented acesulfamate ligands and two trans aqua ligands. The axial positions in the octa­hedron are occupied by two N atoms of two trans pyridine ligands. Mol­ecules are stacked in columns running along the a axis. There are π–π stacking inter­actions between the mol­ecules in each column, with a distance of 3.623 (2) Å between the centroids of the pyridine rings. There are also O—H⋯O inter­actions between the columns.     

Di­aqua(2,2′‐bi­pyridine)­malonato­manganese(II)

In the crystal structure of the title compound, [Mn(C₃H₂O₄)(C₁₀H₈N₂)(H₂O)₂], the Mn^II atom demonstrates a distorted octahedral geometry, being coordinated by two N atoms of a 2,2′‐bi­pyridine ligand, two O atoms from the carboxyl­ate groups of the chelating malonate dianion and two O atoms of two cis water mol­ecules. The complex mol­ecules are linked to form a three‐dimensional supramolecular array by both hydrogen‐bonding interactions between coordinated water and the carboxyl­ate groups of neighboring mol­ecules and aromatic π–π‐stacking interactions of the bi­pyridine rings.     

cis‐Bis­[1,3‐bis(2‐fluoro­phenyl)­triazenido‐κ2N1,N3]­bis­(pyridine‐κN)cadmium(II)

In the title compound, [Cd(C₁₂H₈F₂N₃)₂(C₅H₅N)₂], the Cd atom lies on a crystallographic twofold axis in space group Iba2. The coordination geometry about the Cd^II ion corresponds to a rhombically distorted octahedron, with two deprotonated 1,3‐bis(2‐fluoro­phenyl)­triazenide ions, viz. FC₆H₄NNNC₆H₄F⁻, acting as bidentate ligands (four‐electron donors). Two neutral pyridine (py) mol­ecules complete the coordination sphere in positions cis with respect to one another. The triazenide ligand is not planar (r.m.s. deviation = 0.204 Å), the dihedral angle between the phenyl rings of the terminal 2‐fluoro­phenyl substituents being 24.6 (1)°. The triazenide and pyridine Cd—N distances are 2.3757 (18)/2.3800 (19) and 2.3461 (19) Å, respectively. Intermolecular C—H⋯F interactions generate sheets of mol­ecules in the (010) plane.     

Bis(2‐amino­pyridine‐N)­bis­(benzoato‐O)­zinc

The crystal structure of the title compound, [Zn‐(C₇H₅O₂)₂(C₅H₆N₂)₂], is built of monomeric [Zn(2‐apy)₂(OBz)₂] mol­ecules (apy is amino­pyridine and OBz is benzoate). The Zn atom lies on a twofold symmetry axis and adopts a slightly distorted tetrahedral coordination. The Zn?O distances to the non‐coordinated O atoms are long at 2.872 (3) Å. Each non‐ligating carbonyl O atom of the benzoate anion accepts one intramolecular and one intermolecular hydrogen bond from the amino group. The mol­ecules form a chain along the c axis through intermolecular N—H?O hydrogen bonds between the amino and carboxyl groups.     

trans‐Dichloro(dimethyl sulfide‐κS)(pyridine‐κN)platinum(II)

The structure of the title compound, [PtCl₂(C₅H₅N)(C₂H₆S)], consists of discrete mol­ecules in which the Pt‐atom coordination is slightly distorted square planar. The Cl atoms are trans to each other, with a Cl—Pt—Cl angle of 176.60 (7)°. The pyridine ligand is rotated 64.5 (2)° from the Pt square plane and one of the Pt—Cl bonds essentially bisects the C—S—C angle of the di­methyl sulfide ligand. In the crystal structure, there are extensive weak C—H⋯Cl interactions, the shortest of which connects mol­ecules into centrosymmetric dimers. A comparison of the structural trans influence on Pt—S and Pt—­N distances for PtS(CH₃)₂ and Pt(pyridine) fragments, respectively, in square‐planar Pt^II complexes is presented.     

Bis(O‐ethyl di­thio­carbonato‐κ2S,S′)­palladium(II)

The Pd atom in the title compound, [Pd(C₃H₅OS₂)₂], lies on an inversion center and adopts a square‐planar coordination geometry defined by the four S atoms of the two di­thio­carbonate (xanthate) ligands. In the solid state, the mol­ecules aggregate into layers in which the rows of mol­ecules alternate their orientation to allow each Pd atom to interact with two symmetry‐equivalent S atoms of the xanthate ligands of adjacent mol­ecules, generating a pseudo‐octahedral environment around each Pd atom. This weak interaction of 3.3579 (7) Å can be classified as a closed‐shell electrostatic intermolecular interaction.     

trans‐Di­aqua­bis(5‐carboxy‐1H‐imidazole‐4‐carboxyl­ato‐κ2N3,O4)­cobalt(II) 4,4′‐bi­pyridine solvate

In the title compound, [Co(C₅H₃N₂O₄)₂(H₂O)₂]·C₁₀H₈N₂, the Co atom is trans‐coordinated by two pairs of N and O atoms from two monoanionic 4,5‐di­carboxy­imidazole ligands, and by two O atoms from two coordinated water mol­ecules, in a distorted octahedral geometry. The 4,4′‐bi­pyridine solvent molecule is not involved in coordination but is linked by an N—H⋯N hydrogen bond to the neutral [Co(C₅H₃N₂O₄)₂(H₂O)₂] mol­ecule. Both mol­ecules are located on inversion centers. The crystal packing is stabilized by N—H⋯N and O—H⋯O hydrogen bonds, which produce a three‐dimensional hydrogen‐bonded network. Offset π–π stacking interactions between the pyridine rings of adjacent 4,4′‐bi­pyridine molecules were observed, with a face‐to‐face distance of 3.345 (1) Å.     

Di‐μ‐sulfido‐bis[diaqua(18‐crown‐6)­barium(II)]–saccharin (1/2)

The mol­ecule of the title compound {systematic name: di‐μ‐sulfido‐bis[di­aqua(1,4,7,10,13,16‐hexaoxa­cyclo­octade­cane‐κ⁶O)barium(II)] bis­[1,2‐benzisothiazol‐3(2H)‐one 1,1‐dioxide]}, [Ba₂S₂(C₁₂H₂₄O₆)₂(H₂O)₄](C₇H₅NO₃S)₂, lies on an inversion centre. The Ba^II atom encapsulated by the 18‐crown‐6 ring is coordinated by the six O atoms of the crown, two water O atoms and two bridging S atoms. The four‐membered ring composed of the Ba^II atoms and the bridging S atoms makes a dihedral angle of 67.1 (1)° with the crown‐ether ring. The aromatic ring system of the saccharin moiety is essentially planar. The packing is built up from layers of the mol­ecules and is stabilized by three intermolecular O—H?O hydrogen bonds.     

Bis(2,2′‐bi­pyridine‐κ2N,N′)(oxalato‐κ2O,O′)­cobalt(II) pentahydrate

The synthesis and crystal structure of the mononuclear title compound, [Co(C₂O₄)(C₁₀H₈N₂)₂]·5H₂O, is reported. The Co atom is six‐coordinated by two O atoms of a bidentate oxalate group and by four N atoms of two bi­pyridine ligands. The neutral [Co(C₂O₄)(C₁₀H₈N₂)₂] entities are connected by π–π stacking interactions of the aromatic systems into a two‐dimensional layer, interconnected through a ladder‐like hydrogen‐bonding pattern of solvate water mol­ecules.     

trans‐Diaquabis(1H‐imidazole‐4,5‐di­carboxyl­ate‐κ2N3,O4)­manganese(II)

In the title compound, [Mn(C₅H₃N₂O₄)₂(H₂O)₂], the Mn^II atom lies on an inversion centre, is trans‐coordinated by two N,O‐bidentate 1H‐imidazole‐4,5‐di­carboxyl­ate monoanionic ligands [Mn—O = 2.202 (3) Å and Mn—N = 2.201 (4) Å] and two water mol­ecules [Mn—O = 2.197 (4) Å], and exhibits a distorted octahedral geometry, with adjacent cis angles of 76.45 (13), 86.09 (13) and 89.20 (13)°. The complete solid‐state structure can be described as a three‐dimensional supramol­ecular framework, stabilized by extensive hydrogen‐bonding interactions involving the coordinated water mol­ecules, the carboxy O atoms and the protonated imidazole N atoms of the imidazole‐4,5‐di­carboxyl­ate ligands.     

Di­aqua­bis­[μ‐(R,R)‐tartrato‐κ4O1,O2:O3,O4]­dinickel(II) trihydrate

In the crystal structure of the title compound, [Ni₂(C₄H₄O₆)₂(H₂O)₂]·3H₂O, two nickel cations, two tartrate anions and two water mol­ecules form the dimeric complex. Each nickel cation is in a distorted octahedral environment composed of four O atoms of two crystallographically independent tartrate anions, one water mol­ecule and one O atom of a symmetry‐equivalent tartrate anion. The asymmetric unit contains three additional water mol­ecules which are connected via hydrogen bonding.     

Tris(ethyl­ene­diamine)­nickel(II) bis­[2‐cyano‐2‐(oxidoimino)­acetamidato]­nickelate(II) monohydrate

The title compound, [Ni(C₂H₈N₂)₃][Ni(C₃HN₃O₂)₂]·H₂O, appears to be a modular associate consisting of two complex counter‐ions, containing bivalent nickel as the central atom in both cases, and a solvent water mol­ecule. The Ni^II ion in the complex cation lies on the C₂ crystallographic axis. Its coordination environment is formed by six N atoms of three ethyl­ene­diamine (en) mol­ecules, representing a distorted octa­hedral geometry. The Ni^II ion in the complex anion occupies a position at the center of inversion. It exhibits a distorted square‐planar coordination geometry formed by four N atoms belonging to the deprotonated oxidoimine and amide groups of the two doubly charged 2‐cyano‐2‐(oxidoimino)acetamidate anions, situated in trans positions with respect to each other. In the crystal packing, the complex anions are linked by water mol­ecules via hydrogen bonds between the amide O atoms and water H atoms, forming chains translated along the a direction. The [Ni(en)₃]²⁺ cations fill empty spaces between the translational chains, connecting them by hydrogen bonds between the oxime and amide O atoms of the anions and the amine H atoms of the cations, forming layers along the ac plane. The water mol­ecules provide connection between layers through N atoms of the cations, thus forming a three‐dimensional modular structure.     

Diaqua­malonato(1,10‐phenanthro­line)­zinc(II)

In the crystal structure of the title complex, [Zn(C₃H₂O₄)(C₁₂H₈N₂)(H₂O)₂], the Zn^II atom displays a distorted octa­hedral geometry, being coordinated by two N atoms from the 1,10‐phenanthroline ligand, two O atoms from different carboxyl­ate groups of the chelating malonate dianion and two O atoms of cis water mol­ecules. The complex mol­ecules are linked to form a three‐dimensional supramolecular array by both hydrogen‐bonding inter­actions between coordinated water molecules and the uncoordinated carboxyl­ate O atoms of neighboring mol­ecules, and aromatic π–π stacking inter­actions between neighboring phenanthroline rings.     

Bis(μ‐2‐amino­pyridine)­bis­[(tri­fluoro­acetato)silver(I)]

The title compound, [Ag₂(C₂F₃O₂)₂(C₅H₆N₂)₂], is a dinuclear Ag^I complex with inversion symmetry. Each Ag atom is three‐coordinated by two N atoms from two different 2‐amino­pyridine ligands and by one O atom from a tri­fluoro­acetate anion, giving an approximately trigonal coordination environment. In the crystal packing, mol­ecules are connected by N—H⋯O and N—H⋯F hydrogen bonds, forming layers parallel to the (001) plane.     

Bis(μ‐3‐nitrobenzene‐1,2‐dicarboxyl­ato)‐κ8O1,O2:O2,O3;O3,O2:O2,O1‐bis­[triaqua­(2‐carboxy‐3‐nitro­benzoato‐κ2O,O′)lanthanum(III)] dihydrate

The title compound, [La₂(C₈H₃NO₆)₂(C₈H₄NO₆)₂(H₂O)₆]·2H₂O, consists of dimeric units related by an inversion center. The two La^III atoms are linked by two bridging bidentate carboxyl­ate groups and two monodentate carboxyl­ate groups. Each La^III atom is nine‐coordinated by six O atoms from five different carboxyl­ate groups and three from water mol­ecules. Hydrogen bonds between the water mol­ecules and between the solvent water and a carboxyl­ate O atom are observed in the structure. In the crystal packing, there are slipped π–π stacking inter­actions between the parallel benzene rings. Both hydrogen‐bonding and π–π inter­actions combine to stabilize the three‐dimensional supra­molecular network.     

catena‐Poly[[[diaqua­bis(pyridine‐4‐carboxamide‐κN)copper(II)]‐μ2‐squarato‐κO1:O3] dihydrate]

The asymmetric unit of the title compound, {[Cu(C₄O₄)(C₆H₆N₂O)₂(H₂O)₂]·2H₂O}_n, consists of one pyridine‐4‐carbox­amide (isonicotinamide or ina) ligand, one‐half of a squarate dianion, a coordinated aqua ligand and a solvent water mol­ecule. Both the Cu^II and the squarate ions are located on inversion centers. The Cu^II ions are octa­hedrally surrounded by four O atoms of two water mol­ecules and two squarate anions, and by two N atoms of the isonicotinamide ligands. The crystal structure contains chains of squarate‐1,3‐bridged Cu^II ions. These chains are held together by N—H⋯O and O—H⋯O inter­molecular hydrogen‐bond inter­actions, forming an extensive three‐dimensional network.     

catena‐Poly­[[[di­aqua­bis(5‐chloro­pyridinium‐2‐olato‐κO)copper(II)]‐μ‐pyrazine‐κ2N:N′] diperchlorate]

In the title compound, [Cu(C₅H₄ClNO)₂(C₄H₄N₂)(H₂O)₂](ClO₄)₂, the Cu atom, which lies on an inversion centre, has an octahedral environment. The pyrazine ligand also lies about an inversion centre and links adjacent Cu atoms into a chain running along the b axis; perchlorate anions occupy the space between the chains, and the chains use the coordinated water mol­ecules to link to the anions, resulting in a hydrogen‐bonded ribbon structure. The donor 5‐chloro‐2‐hydroxy­pyridine ligand exists in the zwitterionic form, i.e. 5‐chloro­pyridinium‐2‐olate.     

trans‐Bis[3‐(2‐fluorophenyl)‐1‐(4‐nitrophenyl)triazenido‐κN3]bis(pyridine‐κN)palladium(II)

In the title complex, [Pd(C₁₂H₈FN₄O₂)₂(C₅H₅N)₂] or trans‐[Pd(FC₆H₄N=N—NC₆H₄NO₂)(C₅H₅N)₂], the Pd atom lies on a centre of inversion in space group P. The coordination geometry about the Pd²⁺ ion is square planar, with two deprotonated 3‐(2‐fluoro­phenyl)‐1‐(4‐nitro­phenyl)­triazenide ions, FC₆H₄N=N—NC₆H₄NO₂^?, acting as monodentate ligands (two‐electron donors), while two neutral pyridine mol­ecules complete the metal coordination sphere. The whole triazenide ligand is not planar, with the largest interplanar angle being 16.8 (5)° between the phenyl ring of the 2‐­fluorophenyl group and the plane defined by the N=N—N moiety. The Pd—N(triazenide) and Pd—N(pyridine) distances are 2.021 (3) and 2.039 (3) Å, respectively.     

Bis(μ‐3,5‐di‐tert‐butylcatecholato‐O1:O1,O2)bis[tris(pyridine‐N)cadmium(II)] dipyridine solvate

X‐ray diffraction shows that the title cadmium(II) complex, [Cd₂(C₁₄H₂₀O₂)₂(C₅H₅N)₆]·2C₅H₅N, has a dimeric structure in which two (py)₃Cd(3,5‐di‐tert‐butylcatecholate) units (py is pyridine) are connected by two bridging O atoms, the coordination of the Cd atoms being distorted octahedral. There are two symmetrically independent dimers in the crystal structure; one is in a general position and the other lies about an inversion centre. In both cases, the bridging Cd—O distances between the Cd–catecholate units [2.224 (2)–2.237 (2) Å] are shorter than the bridging Cd—O distances within the catecholate cycle [2.273 (2)–2.281 (2) Å]. The Cd—N_py distances are 2.354 (2)–2.471 (2) Å. Besides the main mol­ecules, the crystal also contains pyridine solvate mol­ecules.     

Tris(3,5‐di­methyl‐1H‐pyrazole‐1‐thio­carboxamidato‐κ2N2,N)­cobalt(III)

In the crystal structure of the title complex, [Co(C₆H₈N₃S)₃], the Co^III atom is octahedrally coordinated by three monodeprotonated bidentate 3,5‐di­methyl‐1H‐pyrazole‐1‐thio­carbox­amide ligands with two thio­carbox­amide N atoms in axial positions. The asymmetric unit contains two mol­ecules (A and B) and these mol­ecules are arranged in chains in an alternating fashion connected by N—H⋯S interactions.