An unexpected chelate conformation in trans‐[(R)‐N,N′‐bis(α‐phenyl­salicyl­idene)­propane‐1,2‐diaminato(2–)]­bis(1‐methyl‐1H‐imidazole‐κN3)­cobalt(III) perchlorate

The title compound, [Co(C₂₉H₂₄N₂O₂)(C₄H₆N₂)₂]ClO₄, contains an optically active tetradentate Schiff base ligand in an equatorial plane and two 1‐methyl­imidazole ligands at apical positions. The central N—C—C—N chelate ring of the Schiff base ligand has an envelope structure with a λ conformation, which is different from the solution structure predicted from circular dichroism and ¹H NMR spectra.     

Bis­(acetone‐κO)­bis(N,N′‐di­methyl­ethyl­enedi­amine‐κ2N,N′)copper(II) diperchlorate

The title compound, [Cu(C₄H₁₂N₂)₂(C₃H₆O)₂](ClO₄)₂, is the first structurally characterized Cu^II complex having acetone as axial ligands. The complex adopts an elongated octahedral trans‐[CuN₄O₂] coordination geometry, with the Cu atom having 222 site symmetry. The axial Cu—O(acetone) and in‐plane Cu—N bond lengths are 2.507 (5) and 2.041 (3) Å, respectively.     

A ruthenium complex with 1,5‐di­phenyl‐3‐thio­carbazone (dithizone) as monodentate ligands: bis(2,2′‐bipyridyl‐κ2N,N′)­bis­(dithizonato‐κS)ruthenium(II)

The title compound, [Ru(C₁₃H₁₁N₄S)₂(C₁₅H₈N₂)₂], has C₂ symmetry, with bidentate 2,2′‐bipyridyl ligands dictating a cis geometry around the Ru^II center. The monodentate S‐bonded dithizone ligands are almost planar, except for one of the phenyl rings, which is twisted by 34.2 (4)° from the N/N/C(S)/N/N plane. The Ru—S bond length is 2.4140 (13) Å, and the Ru—N bond lengths are 2.048 (4) and 2.074 (4) Å.     

Chloro{2,2′‐[(1S,2S)‐1,2‐di­phenyl‐1,2‐ethanediyl­bis­(nitrilo­methyl­idyne)]­diphenolato‐κ4O,N,N′,O′}(ethanol‐κO)­manganese(III)

The crystal structure of the title compound, [MnCl(C₂₈H₂₂N₂O₂)(C₂H₆O)], has been determined at 173 (2) K in the non‐centrosymmetric space group P2₁2₁2₁. The asymmetric unit contains two molecular units. An intermolecular O—H⋯Cl hydrogen bond is formed between the OH group of an ethanol mol­ecule coordinated to the Mn atom and the coordinated Cl⁻ anion, and so polymeric chains of Mn‐containing fragments are formed [O—H⋯Cl = 3.1281 (16) and 3.1282 (15) Å]. The Mn atoms have a pseudo‐octahedral coordination sphere, with the four donor atoms of the Schiff base forming an equatorial plane [Mn—O distances are 1.8740 (13), 1.8717 (13), 1.8749 (13) and 1.8823 (13) Å, and Mn—N distances are 1.9868 (15), 1.9910 (14), 1.9828 (15) and 1.9979 (14) Å]. The axial positions are occupied by an ethanol mol­ecule [Mn—O distances of 2.3069 (15) and 2.3130 (15) Å] and a Cl⁻ ligand [Mn—Cl distances of 2.5732 (6) and 2.5509 (6) Å].     

(2,2′‐Bipyridyl‐κ2N,N′)­bis­(salicyl­ato‐κ2O,O′)­zinc(II)

The asymmetric unit of the title compound, [Zn(C₇H₅O₃)₂(C₁₀H₈N₂)], contains one monomeric zinc complex. The Zn atom is coordinated to one 2,2′‐bipyridyl ligand via both N atoms and to two salicyl­ate anions (Hsal⁻) in a bidentate chelating manner involving carboxyl­ate O‐atom coordination. The complex exhibits a distorted octahedral geometry about the Zn^II atom, with the `apical' positions occupied by one of the two N atoms of the bipyridyl ligand and an O atom from one Hsal<sup>−</sup> ligand; the Zn atom is 0.168 (1) Å out of the `basal' plane. Two intramolecular six‐membered hydrogen‐bonded rings are present, generated from interactions between the carboxyl and hydroxyl groups of the salicyl­ate ligands. The crystal packing is governed by weak C—H⋯O and C—H⋯π interactions.     

[N,N′‐Bis(3‐aminopropyl)ethylenediamine‐κ4N,N′,N′′,N′′′](trithiocyanurato‐κ2N,S)zinc(II) ethanol solvate

In the crystal structure of the title compound, [N,N′‐bis(3‐­amino­propyl)­ethyl­enedi­amine‐κ⁴N,N′,N′′,N′′′][1,3,5‐triazine‐2,4,6(1H,3H,5H)‐tri­thionato(2−)‐κ²N,S]­zinc(II) ethanol sol­vate, [Zn(C₈H₂₂N₄)₂(C₃HN₃S₃)]·C₂H₆O, the Zn^II atom is octa­hedrally coordinated by four N atoms [Zn—N = 2.104 (2)–2.203 (2) Å] of a tetradentate N‐donor N,N′‐bis(3‐­amino­propyl)­ethyl­enedi­amine (bapen) ligand and by two S and N atoms [Zn—S = 2.5700 (7) Å and Zn—N = 2.313 (2) Å] of a tri­thio­cyanurate(2−) (ttcH²⁻) dianion bonded as a bidentate ligand in a cis configuration. The crystal structure of the compound is stabilized by a network of hydrogen bonds.     

Chloro­di­methyl(N‐methyl­pyrrolidin­one)­tin(IV)‐μ‐chloro‐di­chloro­di­methyl­tin(IV)

The synthesis and the X‐ray structural analysis of the title compound, μ‐chloro‐1:2κ²Cl‐tri­chloro‐1κCl,2κ²Cl‐tetra­methyl‐1κ²C,2κ²C‐(N‐methyl­pyrrolidin‐2‐one)‐1κO‐ditin(IV), [Sn₂Cl₄(CH₃)₄(C₅H₉NO)], are described. The title compound is found to exhibit a distorted trigonal–bipyramidal geometry at both Sn^IV atoms. The Sn—Cl—Sn angle involving the bridging chlorine ligand is 135.56 (5)°, with the Sn—Cl bond lengths being 2.5704 (13) and 3.1159 (13) Å.     

Di­aqua­bis(1,10‐phenanthroline‐κ2N,N′)­manganese(II) thiodiglycolate bis(1,10‐phenanthroline‐κ2N,N′)(thiodiglycolato‐κ2O,O′)­manganese(II) tridecahydrate

The title compound, [Mn(C₁₂H₈N₂)₂(H₂O)₂](C₄H₄O₄S)·[Mn(C₄H₄O₄S)(C₁₂H₈N₂)₂]·13H₂O, contains one dianion of thio­diglycolic acid (tdga²⁻) and two independent man­ganese(II) moieties, viz. [Mn(phen)₂(H₂O)₂]²⁺ and [Mn(tdga)(phen)₂], where phen is 1,10‐phenanthroline. The Mn^II atoms are octahedrally coordinated by four N atoms of two bidentate phen ligands [Mn—N = 2.240 (2)–2.3222 (19) Å] and either two water O atoms or two tdga carboxyl O atoms [Mn—O = 2.1214 (17)–2.1512 (17) Å]. The tdga ligand chelates as an O,O′‐bidentate ligand, forming an eight‐membered ring with one Mn atom. The free tdga²⁻ dianion is hydrogen bonded to an [Mn(phen)₂(H₂O)₂]²⁺ ion, with O⋯O distances of 2.606 (2) and 2.649 (2) Å. The crystal structure is further stabilized by an extensive network of hydrogen bonds involving 13 water mol­ecules.     

{μ‐N,N′‐Bis[3‐(dimethyl­amino)prop­yl]­oxamidato(2–)‐κ6N,N′,O′:N′′,N′′′,O}­bis­[(1H‐imidazole‐κN3)(methanol‐κO)copper(II)] bis­(perchlorate)

The structure of the title compound, [Cu₂(C₁₂H₂₄N₄O₂)(C₃H₄N₂)₂(CH₄O)₂](ClO₄)₂ or [Cu₂(dmoxpn)(HIm)₂(CH₃OH)₂](ClO₄)₂, where dmoxpn is the dianion of N,N′‐bis­[3‐(dimethyl­amino)prop­yl]oxamide and HIm is imidazole, consists of a centrosymmetric trans‐oxamidate‐bridged copper(II) binuclear cation, having an inversion centre at the mid‐point of the central C—C bond, and two perchlorate anions. The Cu^II atom has square‐pyramidal coordination geometry involving two N atoms and an O atom from the dmoxpn ligand, an N atom from an imidazole ring, and an O atom from a methanol mol­ecule. The crystal structure is stabilized by O—H⋯O, N—H⋯O and C—H⋯O hydrogen bonds and imidazole π–π stacking inter­actions to form a three‐dimensional supra­molecular array.     

1‐[(4‐Chloro­benzoyl)­methyl]‐4‐(N,N‐di­methyl­amino)­pyridinium bromide sesquihydrate and 1‐[(4‐bromo­benzoyl)­methyl]‐4‐(N,N‐di­methyl­amino)­pyridinium bromide sesquihydrate

The title compounds, C₁₅H₁₆ClN₂O⁺·Br⁻·1.5H₂O and C₁₅H₁₆BrN₂O⁺·Br⁻·1.5H₂O, are isomorphous. The benzene ring is oriented nearly normal to the pyridine ring in both compounds. The molecular packing is mainly influenced by intermolecular O—H⋯O and O—H⋯Br interactions, as well as weak intramolecular C—H⋯O interactions. The H₂OBr⁻ units form an extended water–bromide chain, with a bridging water mol­ecule on a twofold axis.     

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].     

catena‐Poly­[[silver(I)‐μ‐hexane‐1,6‐di­amine‐κ2N:N′] cinnamate dihydrate]

The title compound, {[Ag(C₆H₁₆N₂)](C₉H₇O₂)·2H₂O}_n, has been synthesized and characterized by elemental analysis and single‐crystal X‐ray diffraction. The Ag atom is coordinated in a linear configuration by two N atoms from two hexane‐1,6‐­diamine ligands, giving a zigzag polymeric chain with an [–Ag—N—C—C—C—C—C—C—N–]_n backbone running parallel to the c axis. In the crystal packing, adjacent chains interact with the anions via the lattice water mol­ecules, thus forming layers parallel to the bc plane.     

N,N,N′,N′‐Tetra­methyl­ethyl­enedi­ammonium dichloride

The structure of the title compound, C₆H₁₈N₂²⁺.2Cl^?, has been determined and has a centre of symmetry. The mol­ecule has strong intermolecular hydrogen bonding between each Cl^? and an N—H bond [Cl?N = 3.012 (3) Å].     

(Glycylglycinato‐κ3O,N,N′)(2‐methyl‐1H‐benzimidazole‐κN3)copper(II) trihydrate

In the title compound, [Cu(C₄H₆N₂O₃)(C₈H₈N₂)]·3H₂O, the Cu^II atom is coordinated in a square‐planar manner by one O atom and three N atoms from glycylglycinate and 2‐methyl­benzimidazole ligands. The ternary complexes assemble into one‐dimensional chains through C—H⋯π inter­actions and direct N—H⋯O hydrogen bonding, as well as into hydrogen‐bonded water helices with branches which also link the complex chains into a three‐dimensional supra­molecular structure.     

Dichloro­(O‐ethyl 3‐methyl­pyridine‐2‐carboximidic acid‐κ2N,N′)copper(II)

In the title compound, [CuCl₂(C₉H₁₂N₂O)], the Cu^II atom is coordinated by two Cl⁻ anions and two N atoms of one O‐ethyl 3‐methyl­pyridine‐2‐carboximidic acid mol­ecule in a slightly distorted square‐planar geometry, with Cu—N distances of 2.0483 (17) and 1.9404 (18) Å, and Cu—Cl distances of 2.2805 (10) and 2.2275 (14) Å. In addition, each Cu^II atom is connected by one Cl⁻ anion and the Cu^II atom from a neighbouring mol­ecule, with Cu⋯Cl and Cu⋯Cu distances of 2.9098 (13) and 3.4022 (12) Å, respectively, and, therefore, a centrosymmetric dimer is formed. Adjacent mol­ecular dimers are connected by π–π stacking inter­actions between pyridine rings to form a zigzag mol­ecular chain. The mol­ecular chains are also enforced by N—H⋯Cl and C—H⋯Cl inter­actions.     

{2,6‐Bis­[(di­methyl­amino)­methyl]­phenyl‐N2,C1,N6}di­phenyl­tin(II) bromide monohydrate

In the title compound, [Sn(C₆H₅)₂(C₁₂H₁₉N₂)]Br·H₂O, the Sn^IV atom lies on a twofold axis and is coordinated by a C and two N atoms from the 2,6‐bis­[(di­methyl­amino)­methyl]­phenyl ligand in a tridentate fashion and by two phenyl groups. The resulting geometry is intermediate between square pyramidal and trigonal bipyramidal, with three C atoms in equatorial and the two N atoms in axial positions. The main deformation from ideal trigonal‐bipyramidal geometry is seen for the N—Sn—N angle [152.18 (7)°]. The Br^? anion and the water solvate mol­ecule are on an inversion centre and twofold axis, respectively. They form an infinite chain of Br?H—O—H?Br hydrogen bonds [Br?O 3.529 (2) Å] without contributing to the primary coordination sphere of the Sn atom.     

{2,6‐Bis­[(di­methyl­amino)­methyl]pyridine‐κ3N}(2,2‐methyl­enediphenolato‐κ2O,O′)­dioxouranium(VI) acetone solvate

In the title compound, [UO₂(C₁₃H₁₀O₂)(C₁₁H₁₉N₃)]·C₃H₆O, the U atom is in a pentagonal–bipyramidal environment, with the three N atoms of the 2,6‐bis­[(di­methyl­amino)­methyl]­pyridine ligand and the two O atoms of the dianionic 2,2′‐methyl­ene­diphenolate ligand in the equatorial plane. The geometry is compared with that of previously reported 1:2 uranyl–diphenoxide complexes.     

catena‐Poly­[[di‐μ‐benzoato‐κ4O:O′‐disilver(I)]‐μ‐N,N′‐bis(2‐fluoro­benzyl­idene)­butane‐1,4‐di­amine‐κ2N:N′]

The title complex, [Ag₂(C₇H₅O₂)₂(C₁₈H₁₈F₂N₂)]_n, is a dinuclear silver(I) compound with one inversion centre between pairs of Ag atoms and another at the mid‐point of the central C—C bond in the butane‐1,4‐diamine moiety. Each of the smallest repeat units consists of two silver(I) cations, two benzoate anions and one N,N′‐bis(2‐fluorobenzyl­idene)­butane‐1,4‐di­amine Schiff base ligand. Each Ag^I ion is three‐coordinated in a trigonal configuration by two O atoms from two benzoate anions and one N atom from a Schiff base ligand. The di‐μ‐benzoato‐disilver(I) moieties are linked by the bridging Schiff base ligand, giving zigzag polymeric chains with an [–Ag⋯Ag—N—C—C—C—C—N–]_n backbone running along the b axis.     

Di­bromo(N,N′‐di‐2‐pyridyl­amine‐κ2N,N′)­palladium(II)

The palladium center of the title compound, [PdBr₂(C₁₀H₉N₃)], has a slightly distorted square‐planar conformation, with the Pd atom bonded to the two pyridine N atoms of the di‐2‐pyridyl­amine moiety and to two Br atoms. The Pd—Br and Pd—N bond lengths are 2.4168 (6)/2.4201 (5) and 2.036 (3)/2.042 (3) Å, respectively.     

Bis­[N,N‐bis(2‐hydroxy­ethyl)­di­thio­carbamato]­di­methyl­tin(IV)

The title compound, [Sn(CH₃)₂(C₅H₁₀NO₂S₂)₂], has crystallographic mirror symmetry (C—Sn—C on mirror plane) and the coordination polyhedron around the Sn atom is a tetrahedron [C—Sn—C 139.3 (2)° and S—Sn—S 82.3 (1)°] distorted towards a skew‐trapezoidal bipyramid owing to an intramolecular Sn?S contact [3.0427 (6) Å]. The mol­ecules are linked into a linear chain by intermolecular O—H?O hydrogen bonds [O?O 2.646 (3) Å].