Aqua­(2,2′‐diamino‐4,4′‐bi‐1,3‐thia­zole‐κ2N,N′)(oxydiacetato‐κ3O,O′,O′′)cobalt(II) trihydrate

The title compound, [Co(C₄H₄O₅)(C₆H₆N₄S₂)(H₂O)]·3H₂O, displays a distorted octa­hedral coordination geometry. The tridentate oxydiacetate dianion chelates the Cu^II atom in the meridional mode. In the crystal packing, hydro­philic and hydro­phobic layers are arranged in an alternating manner. In addition, a three‐dimensional hydrogen‐bonding framework and π–π stacking are present.     

Aqua­bis(3‐meth­oxy‐2‐pyridonato)­(2,2′:6′,2′′‐terpyridine)ruthenium(II)–acetonitrile–water (1/1/1)

The title compound, [Ru(C₆H₆NO₂)₂(C₁₅H₁₁N₃)(H₂O)]·CH₃CN·H₂O, is a transfer hydrogenation catalyst supported by nitro­gen‐donor ligands. This octa­hedral Ru^II complex features rare monodentate coordination of 3‐meth­oxy‐2‐pyridonate ligands and inter­ligand S(6)S(6) hydrogen bonding. Comparison of the title complex with a structural analog with unsubstituted 2‐pyridonate ligands reveals subtle differences in the orientation of the ligand planes.     

Aqua(2,2′‐di­amino‐4,4′‐bi‐1,3‐thia­zole‐κ2N,N′)(imino­diacetato‐κ3O,N,O′)­chromium(III) chloride mono­hydrate

Crystals of the title compound, [Cr(C₄H₅NO₄)(C₆H₆N₄S₂)(H₂O)]Cl·H₂O, consist of Cr^III complex cations, Cl⁻ counter‐ions and lattice water mol­ecules. The complex cation assumes an octahedral coordination geometry, formed by a tridentate imino­di­acetate dianion (IDA), a di­amino­bi­thia­zole (DABT) mol­ecule and a water mol­ecule. The planar DABT group chelates the Cr^III ion with normal Cr—N distances [2.0574 (17) and 2.0598 (17) Å], but the DABT mol­ecule is inclined to the coordination plane by a dihedral angle of 17.23 (7)°. In the monodentate carboxylate groups of the IDA ion, the coordinated C—O bonds [1.288 (3) and 1.284 (3) Å] are much longer than the uncoordinated C—O bonds [1.222 (3) and 1.225 (3) Å].     

μ‐Cyano‐1:2κ2C:N‐tetracyano‐1κ4C‐(5‐methyl‐5‐nitro‐3,7‐diazanonane‐1,9‐diamine‐2κ4N1,3,7,9)‐nitrosyl‐1κN‐copper(II)iron(II) dihydrate

The title binuclear complex, [CuFe(CN)₅(C₈H₂₁N₅O₂)(NO)]·2H₂O or [CuFe(nelin)(CN)₅(NO)]·2H₂O (nelin is 5‐methyl‐5‐nitro‐3,7‐di­aza­nonane‐1,9‐di­amine) consists of discrete binuclear mixed‐metal species, with a Cu centre linked to an Fe centre through a cyano bridge, and two water mol­ecules of crystallization. In the complex, the Cu^II ion is coordinated by five N atoms and has a distorted square‐pyramidal geometry. The Fe^II centre is in a distorted octahedral environment.     

(η3‐Allyl‐2κ3C)(chloro‐1κCl)(μ‐N,N′‐diethyldithioxamidato‐1:2κ4S,S′:N,N′)[diphenyl(2‐pyridyl)phosphine‐1κP]palladium(II)platinum(II) chloroform solvate

The title compound, [PdPtCl(C₃H₅)(C₆H₁₀N₂S₂)(C₁₇H₁₄NP)]·CHCl₃, was obtained by deprotonation of the initial platinum(II) complex of the di­thio­xamide and subsequent reaction with [Pd(η³‐C₃H₅)(μ‐Cl)]₂. Both metal atoms exhibit a square‐planar coordination geometry, with the two planes forming a dihedral angle of 21.7 (2)°. The di­thio­xamide bis‐chelating bridge is flat.     

The CoIII—C bond in (1‐thia‐4,7‐diazacyclodecyl‐κ3N4,N7,C10)(1,4,7‐triazacyclononane‐κ3N1,N4,N7)cobalt(III) dithionate hydrate

In the title compound, [Co(C₆H₁₅N₃)(C₇H₁₅N₂S)]S₂O₆·H₂O, the Co—C bond distance is 1.9930 (13) Å, which is shorter than for related compounds with the linear 1,6‐di­amino‐3‐thia­hexan‐4‐ide anion in place of the macrocyclic 1‐thia‐4,7‐diazacyclo­decan‐8‐ide anion. The coordinated carbanion produces an elongation of 0.102 (7) Å of the Co—N bond to the 1,4,7‐tri­aza­cyclo­nonane N atom in the trans position. This relatively small trans influence is presumably a result of the tri­amine ligand forming strong bonds to the Co^III atom.     

Hexaamminecobalt(III) aquabis(nitrilotriacetato‐κ4N,O,O′,O′′)gadolinate(III) octahydrate

Crystals of the title compound, [Co(NH₃)₆][Gd(C₆H₆NO₆)₂(H₂O)]·8H₂O, were synthesized in and collected from aqueous solution. The hexaamminecobalt(III) cation has the expected octahedral geometry, while the Gd coordination sphere has the geometry of a tricapped trigonal prism, with the two nitrilo­tri­acetate N atoms and one water mol­ecule occupying the capping positions.     

Aqua(nitrilo­triacetato)­(1,10‐phenanthroline)iron(III) monohydrate: a seven‐coordinate iron(III) complex

Reaction of 1,10‐phenanthroline (phen) with iron trichloride in the presence of sodium nitrilo­tri­acetate (NTA) resulted in the formation of red crystals of the title complex, [Fe(C₆H₆NO₆)(C₁₂H₈N₂)(H₂O)]·H₂O. The Fe atom has a distorted capped trigonal prismatic coordination comprised of one tetradentate NTA, one bidentate phen molecule and a water mol­ecule. Intermolecular O—H?O hydrogen bonds link the mol­ecules into infinite chains. The chains are crosslinked by hydrogen bonds involving the solvent water mol­ecule, leading to an infinite ladder packing mode.     

Aqua(dipicolinato‐κ3O2,N,O6)(1,10‐phenanthroline‐κ2N,N′)manganese(II) monohydrate

In the title compound [systematic name: aqua(1,10‐phenanthroline‐κ²N,N′)(pyridine‐2,6‐di­carboxyl­ato‐κ³O²,N,O⁶)manganese(II) monohydrate, [Mn(C₇H₃NO₄)(C₁₂H₈N₂)(H₂O)]·H₂O, the manganese(II) centre is surrounded by one bidentate phenanthroline ligand [Mn—N = 2.248 (3) and 2.278 (3) Å], one tridentate dipicolinate ligand [Mn—N = 2.179 (3) Å, and Mn—O = 2.237 (2) and 2.266 (2) Å] and one water mol­ecule [Mn—O = 2.117 (3) Å], and it exhibits a strongly distorted octahedral geometry, with trans angles ranging from 144.12 (9) to 158.88 (11)°. Extensive intermolecular hydrogen‐bonding interactions involving coordinated and uncoordinated water mol­ecules and the carboxyl O atoms of the dipicolinate ligand, as well as a stacking interaction involving the phenanthroline rings, are observed in the crystal structure.     

mer‐(4‐Amino­benzene­sulfonato‐κN)tri­aqua(1,10‐phenanthroline‐κ2N,N′)cobalt(II) chloride

Both coordination and hydrogen bonds contribute to networking in the supramolecular title compound, [Co(C₆H₆­NO₃S)(C₁₂H₈N₂)(H₂O)₃]Cl, which contains a discrete [Co(C₆H₆NO₃S)(C₁₂H₈N₂)(H₂O)₃]⁺ complex cation, formed by one 4‐amino­benzene­sulfonate ligand, one 1,10‐phenanthroline ligand and three coordinated water mol­ecules, together with one uncoordinated chloride anion. These discrete cations and chloride anions are connected by hydrogen‐bonding interactions into a two‐dimensional supramolecular motif. Further hydrogen‐bonding interactions consolidate the structural architecture and extend the two‐dimensional supramol­ecular structure into a three‐dimensional network.     

Triaqua(2,2′‐bipyridine‐κ2N,N′)(nitrato‐κO)manganese(II) nitrate

The crystal structure of the title compound, [Mn(NO₃)(C₁₀H₈N₂)(H₂O)₃]NO₃, contains a monomeric [Mn(NO₃)(bpy)(H₂O)₃]⁺ cation (bpy is 2,2′‐bi­pyridine) and a nitrate anion. The Mn^II ion is coordinated by one chelating bpy [Mn—N 2.241 (3) and 2.259 (3) Å], three water mol­ecules [Mn—O 2.120 (3)–2.188 (3) Å] and a nitrate ligand [Mn—O 2.228 (2) Å] in a distorted octahedral geometry. There are O?H—O hydrogen‐bonding interactions between the ligated water mol­ecules and the ligated and unligated nitrate anions, resulting in double columns of stacked cations and anions.     

Hydrogen‐bonded supra­molecular arrays of aqua­[20‐(4‐carboxy­phen­yl)‐5,10,15‐triphenyl­porphyrinato]zinc(II) in crystals of its nitro­benzene disolvate

Crystals of the title compound, [Zn(C₄₅H₂₈N₄O₂)(H₂O)]·2C₆H₅NO₂, consist of multiporphyrin supra­molecular assemblies sustained by inter­molecular COOH⋯COOH and Zn(H₂O)⋯COOH hydrogen bonds. One of the two nitro­benzene solvent mol­ecules hydrogen bonds peripherally to these arrays.     

Aqua[bis(pyrimidin‐2‐yl‐κN)amine](carbonato‐κ2O,O′)copper(II) dihydrate

The title mononuclear complex, [Cu(CO₃)(C₈H₇N₅)(H₂O)]·2H₂O, was obtained by fixation of CO₂ by a mixture of copper(II) tetra­fluoro­borate and the ligand bis­(pyrimidin‐2‐yl)­amine in ethanol/water. The Cu^II ion of the complex has a distorted square‐pyramidal environment, with a basal plane formed by two N atoms of the ligand and two chelating O atoms of the carbonate group, while the apical position is occupied by the O atom of the coordinating water mol­ecule. In the solid state, hydrogen‐bonding interactions are dominant, the most unusual being the Watson–Crick‐type coplanar ligand pairing through two N—H?N bonds. Lattice water mol­ecules also participate in hydrogen bonding.     

Aqua­(di‐2‐pyridylamine)oxalato­copper(II) monohydrate

In the structure of the title complex, [Cu(C₂O₄)(C₁₀H₉N₃)(H₂O)]·H₂O, the Cu^II atom displays a square‐pyramidal geometry, being coordinated by two N atoms from the di‐2‐pyridylamine ligand, two O atoms from the oxalate group and one O atom of a water mol­ecule. The complex mol­ecules are linked to form a three‐dimensional supra­molecular array by hydrogen‐bonding inter­actions between coordinated/uncoordinated water mol­ecules and the uncoordinated oxalate O atoms of neighboring mol­ecules.     

η5‐(3)‐1‐Methyl‐1,2‐dicarbollyl‐η5‐2′,5′‐dimethylpyrrolylcobalt(III)

In the title compound, (η⁵‐2,5‐di­methyl­pyrrolyl)[(7,8,9,10,11‐η)‐7‐methyl‐7,8‐dicarba‐nido‐undecaborato]­cobalt(III), [3‐Co{η⁵‐[2,5‐(CH₃)₂‐NC₄H₂]}‐1‐CH₃‐1,2‐C₂B₉H₁₀] or [Co(C₃H₁₃B₉)(C₆H₈N)], the Co^III atom is sandwiched between the pentagonal faces of the pyrrolyl and dicarbollide ligands, resulting in a neutral mol­ecule. The C—C distance in the dicarbollide cage is 1.649 (3) Å.     

A chloro(2‐pyridinecarboxaldehyde)(2,2′:6′,2′′‐ter­pyridine)­ruthenium(II) complex

The aldehyde moiety in the title complex, chloro(2‐pyridinecarboxaldehyde‐N,O)(2,2′:6′,2′′‐terpyridine‐κ³N)ruthenium(II)–chloro­(2‐pyridine­carboxyl­ic acid‐N,O)(2,2′:6′,2′′‐ter­pyridine‐κ³N)­ruthenium(II)–perchlorate–chloro­form–water (1.8/0.2/2/1/1), [RuCl­(C₆H₅NO)­(C₁₅H₁₁N₃)]_1.8[RuCl­(C₆H₅­NO₂)(C₁₅H₁₁N₃)]_0.2­(ClO₄)₂·­CHCl₃·­H₂O, is a structural model of substrate coordination to a transfer hydrogenation catalyst. The title complex features two independent Ru^II complex cations that display very similar distorted octahedral coordination provided by the three N atoms of the 2,2′:6′,2′′‐ter­pyridine ligand, the N and O atoms of the 2‐pyridine­carbox­aldehyde (pyCHO) ligand and a chloride ligand. One of the cation sites is disordered such that the aldehyde group is replaced by a 20 (1)% contribution from a carboxyl­ic acid group (aldehyde H replaced by carboxyl O—H). Notable dimensions in the non‐disordered complex cation are Ru—N 2.034 (2) Å and Ru—O 2.079 (2) Å to the pyCHO ligand and O—C 1.239 (4) Å for the pyCHO carbonyl group.     

(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.     

trans‐Aquachloro[(1R,4R,8S,11S)‐6,13‐diammonio‐6,13‐dimethyl‐1,4,8,11‐tetra­azacyclo­tetra­decane‐κ4N1,4,8,11]nickel(II) trichloride trihydrate

The title compound, [NiCl(C₁₂H₃₂N₆)(H₂O)]Cl₃·3H₂O, has the bis­(diamine)‐substituted cyclic tetra­amine in a planar coordination to triplet ground‐state Ni^II [average Ni—N = 2.068 (3) Å], with a chloride ion [Ni—Cl = 2.4520 (5) Å] and a water mol­ecule [Ni—O = 2.177 (2) Å] coordinated in the axial sites. The amine substituents are protonated and equatorially oriented. The amine groups, ammonium groups, water molecules and chloride ions are linked by an extensive hydrogen‐bonding network.     

Poly[[[aqua­(2,2′‐bipyridine‐κ2N,N′)manganese(II)]‐μ3‐acetyl­enedicarboxylato‐κ3O:O′:O′′] monohydrate]

In the title complex, {[Mn(C₄O₄)(C₁₀H₈N₂)(H₂O)]·H₂O}_n, each Mn^II ion has a distorted octa­hedral coordination formed by two N atoms of a 2,2′‐bipyridine ligand, three carboxyl O atoms of three different acetyl­ene­dicarboxyl­ate ligands and one coordinated water mol­ecule. The acetyl­ene­dicarboxyl­ate ligands act in a tridentate mode connecting adjacent Mn^II ions and constructing a two‐dimensional structure which can be regarded as an unusual plywood‐like stacked network.     

Cobalt(II) and nickel(II) complexes of isoquinoline‐1‐carboxylate

trans‐Di­aqua­bis­(iso­quinoline‐1‐carboxyl­ato‐κ²N,O)­cobalt(II) dihydrate, [Co(C₁₀H₆NO₂)₂(H₂O)₂]·2H₂O, and trans‐di­aqua­bis­(iso­quinoline‐1‐carboxyl­ato‐κ²N,O)­nickel(II) dihydrate, [Ni(C₁₀H₆NO₂)₂(H₂O)₂]·2H₂O, contain the same isoquinoline ligand, with both metal atoms residing on a centre of symmetry and having the same distorted octahedral coordination. In the former complex, the Co—O(water) bond length in the axial direction is 2.167 (2) Å, which is longer than the Co—O(carboxylate) and Co—N bond lengths in the equatorial plane [2.055 (2) and 2.096 (2) Å, respectively]. In the latter complex, the corresponding bond lengths for Ni—O(water), Ni—O(carboxylate) and Ni—N are 2.127 (2), 2.036 (2) and 2.039 (3) Å, respectively. Both crystals are stabilized by similar stacking interactions of the ligand, and also by hydrogen bonds between the hydrate and coordinated water molecules.