1,2,4,5‐Tetrakis(2‐vinyl­pyridyl)­benzene–di­chloro­methane (1/2)

The title compound, C₃₄H₂₆N₄·2CH₂Cl₂, lies about an inversion center. The solvent mol­ecules interact with the benzene mol­ecule both through C—H⃛N hydrogen bonding to span pyridine N atoms of adjacent vinyl groups, possibly stabilizing the rotational conformation observed, and through a π interaction between a dichloromethane Cl atom and a pyridyl ring C—C bond of a c‐glide‐related mol­ecule. The benzene mol­ecules form stacks along the a axis such that two of the four olefin groups are properly oriented for photoreactivity (2+2 cyclo­dimerization).     

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.     

Bis­[bis­(di­phenyl­phosphino­methyl)­phenyl­phosphine]­di­chloro­tetra­gold(I) bis­[chloro­tris­(penta­fluoro­phenyl)­aurate(III)]

The cation of the title compound, [Au₄(PPh₂CH₂PPhCH₂PPh₂)₂Cl₂][Au(C₆F₅)₃Cl]₂ or [Au₄Cl₂(C₃₂H₂₉P₃)₂][AuCl(C₆F₅)₃]₂, displays a rhomboidal geometry for the Au atoms, with short Au?Au distances of 3.104 (2) and 3.185 (1) Å; the linear coordination at the Au^I atoms is distorted: P—Au—P 164.7 (2)° and P—Au—Cl 170.67 (11)°. The anion shows the expected square‐planar geometry at Au^III, with the Au atom 0.022 (5) Å out of the plane of the four donor atoms.     

[2‐(Anilino­methyl)­phenyl]­di­phenyl­phosphine and {2‐[(N‐methyl­anilino)­methyl]­phenyl}di­phenyl­phosphine

The title compounds, Ph₂PCH₂N(H)Ph or C₂₅H₂₂NP and Ph₂PCH₂N(CH₃)Ph or C₂₆H₂₄NP, respectively, are isomorphous, with calculated theoretical Tolman angles of 174 and 182°.     

Tris­[2‐(benzoyl­amino)­ethyl]­amine

Tris­[2‐(benzoyl­amino)­ethyl]­amine [alternatively, N,N′,N′′‐(nitrilo­tri­ethyl)­tri­benz­amide], C₂₇H₃₀N₄O₃, adopts a folded structure, forming a symmetrical cavity with an average depth of 7.3 Å and width ranging from 4.1–4.4 Å. The folded structure is a result of one intramolecular N—H?O hydrogen bond. A linear chain motif along the c axis best describes the extended intermolecular N—H?O hydrogen bonding.     

Two isomorphous complexes: di­chloro­[phthalocyaninato(2–)]­tin(IV) and di­chloro­[phthalocyaninato(2–)]­germanium(IV)

Isomorphous triclinic forms of di­chloro­[phthalocyaninato(2−)]­tin(IV), [Sn(C₃₂H₁₆N₈)Cl₂], and di­chloro­[phthalocyaninato(2−)]­ger­manium(IV), [Sn(C₃₂H₁₆N₈)Cl₂], and a monoclinic form of the latter have been obtained from the reaction of pure tin and germanium powder, respectively, with phthalo­nitrile under a stream of ICl vapour. All three crystal structures consist of centrosymmetric [SnPcCl₂] and [GePcCl₂] [Pc is phthalocyaninate(2−)] mol­ecules, which are separated but interacting. In the triclinic forms (Sn and Ge), the Pc macrocycles are not staggered but slipped, and in the monoclinic form (Ge), the mol­ecules are additionally inclined. In both cases, the central Sn or Ge atom is six‐coordinated by the four iso­indole N atoms of the Pc macrocyclic ligand and by two Cl atoms (located trans) into a tetragonal–bipyramidal structure. The arrangement of [SnPcCl₂] and [GePcCl₂] mol­ecules in the crystal structure is determined mainly by intermolecular C—H⃛Cl, π–π and van der Waals interactions.     

μ‐Aqua‐penta­aqua­[μ‐3,6‐bis(6‐methyl‐2‐pyridyl)­pyridazine]­chloro­dinickel(II) trichloride trihydrate

The title compound, μ‐aqua‐1:2κ²O‐penta­aqua‐1κ²O,2κ³O‐μ‐3,6‐bis(6‐methyl‐2‐pyridyl)­pyridazine‐1κ²N¹,N⁶:2κ²N²,N³‐chloro‐1κCl‐dinickel(II) trichloride trihydrate, [Ni₂Cl(C₁₆H₁₄­N₄)(H₂O)₆]Cl₃·3H₂O, consists of two Ni^II atoms, a 3,6‐bis(6‐methyl‐2‐pyridyl)­pyridazine mol­ecule, four Cl atoms and nine water mol­ecules. The two Ni atoms are octahedrally coordinated by N and Cl atoms, and by water mol­ecules, and the three six‐membered rings, a pyridazine and two picolines, are planar to within 0.181 (3) Å. The crystal structure is stabilized by an intra‐ and intermolecular hydrogen‐bonding scheme involving water–water and water–chlorine interactions.     

trans‐[1,3‐Bis(2,4‐di­methyl­phenyl)­imidazolidin‐2‐yl­idene]­di­chloro­(tri­phenyl­phosphine‐κP)­palladium(II)

The title complex, [PdCl₂(C₁₉H₂₂N₂)(C₁₈H₁₅P)], shows slightly distorted square‐planar coordination of the palladium(II) metal center. The Pd—C bond distance between the N‐heterocyclic ligand and the metal atom is 2.008 (3) Å. The dihedral angle between the two di­methyl­phenyl ring planes is 33.17 (13)°.     

Tris­[2‐(2‐oxazolin‐2‐yl)­phenolato]­iron(III)

The title compound, tris­[2‐(4,5‐dihydrooxazol‐2‐yl‐κN)phenolato‐κO]­iron(III), [Fe(C₉H₈NO₂)₃], is disordered over a non‐crystallographic twofold rotation axis perpendicular to the crystallographic threefold rotation axis. The disorder can be a pure rotational disorder of an iron complex in the facial configuration, or the consequence of a mixture of facial and meridional configurations. In the latter case, at least 25% of the iron complexes must adopt the facial configuration in order to obtain the disorder ratio observed in the crystal.     

1,3,5‐Tris­(chloro­methyl)­benzene

The title compound, C₉H₉Cl₃, is being used as a platform for new tripodal receptors. Two mol­ecules make up the asymmetric unit; weak intermolecular hydrogen bonding is observed between methyl­ene H atoms and the chlorine of an adjacent mol­ecule. There are also C—H?π interactions.     

Bis­[tris(3‐cyclo­hexyl­pyrazol‐1‐yl)­hydridoborato]copper(II) di­chloro­methane disolvate

The title compound, [Cu(C₂₇H₄₀BN₆)₂]·2CH₂Cl₂, contains a four‐coordinate Cu^II ion lying on a crystallographic inversion centre, giving rise to a near‐regular square‐planar stereochemistry. There is an axial contact of 2.71 Å between the Cu ion and ligand B—H group, although this is unlikely to correspond to a significant `agostic' interaction.     

Bis(μ‐ethyl pyridine‐2,6‐di­carboxyl­ato)­bis­[di­aqua­chloro­cadmium(II)] dihydrate

The reaction of cadmium chloride with pyridine‐2,6‐di­carboxylic acid (PDA) and 98% H₂SO₄ in ethanol led to the formation of the title compound, bis­[μ‐6‐(ethoxy­carbonyl)­pyridine‐2‐carboxyl­ato]‐1:2κ⁴O⁶,N,O²:O²;1:2κ⁴O²:O²,N,O⁶‐bis­[di­aqua­chloro­cadmium(II)] dihydrate, [Cd₂(C₉H₈NO₄)₂Cl₂(H₂O)₄]·2H₂O. PDA is esterified to monoethyl ­pyridine‐2,6‐di­carboxyl­ate (MEPD) by the catalysis of H₂SO₄ during the reaction. The dinuclear Cd^II complex lies about an inversion centre and the unique Cd atom has a pentagonal–bipyramidal geometry. The two Cd atoms are bridged by two carboxyl­ate O atoms, forming a planar Cd₂O₂ unit. Stair‐like chains are formed via O—H⋯Cl hydrogen bonds and these are further arranged into two‐dimensional layers via hydrogen bonds involving solvate water mol­ecules.     

Bis­[N,N′‐diiso­propyl‐N‐(tri­methyl­silyl)­benzamidinium] di‐μ‐chloro‐bis­[tetra­chloro­zirconate(IV)] di­chloro­methane disolvate

The structure of the salt of the di‐μ‐chloro‐bis­[tetra­chloro­zirconate(IV)] anion and the N,N′‐iso­propyl‐N‐(tri­methyl­silyl)benzamidinium cation, (C₁₆H₂₉N₂Si)₂[Zr₂Cl₁₀]·2CH₂Cl₂, is reported. The anion lies about an inversion centre and shows a substantially octahedral coordination around Zr, while the structure of the cation is unequivocally assigned as that of a benzamidinium ion.     

Bis­[4‐(di­methyl­amino)­pyridinium] hexa­chloro­stannate(IV)

In the title compound, 4‐(di­methyl­amino)­pyridine is proton­ated on the pyridine N atom. The N(CH₃)₂ moiety is twisted 4.4 (2)° from the pyridine‐ring plane. The octahedral [SnCl₆]^2? anion is hydrogen bonded via trans‐Cl atoms to pyridinium N atoms from two cations forming (C₇H₁₁N₂)₂[SnCl₆] structural units.     

catena‐Poly­[europium(III)‐tri‐μ‐2,3‐di­methoxy­benzoato]

The title compound, [Eu(C₉H₉O₄)₃]_n or [Eu(2,3‐DMOBA)₃]_n, where 2,3‐DMOBA is 2,3‐di­methoxy­benzoate, is an infinite one‐dimensional non‐centrosymmetric coordination polymer. The unique Eu^III atom is bridged by six carboxyl­ate ligands; it is ennea‐coordinated and has a distorted tricapped trigonal prism geometry. The Eu—O distances are in the range 2.315 (3)–2.959 (5) Å.     

4‐[3‐(3,4‐Di­methoxy­phenyl)­prop‐2‐enoyl]­phenyl methacryl­ate and 4‐[3‐(2‐bromo­phenyl)­prop‐2‐enoyl]­phenyl methacryl­ate

Chalcones (α,β‐unsaturated ketones) are effective antitumour agents. It has been proved that having halogen or methoxy groups substituted in various positions of the phenyl ring enhances the activity of chalcones many times. The title compounds, C₂₁H₂₀O₅ and C₁₉H₁₅BrO₃, respectively, were chosen for crystallographic study in order to determine their structures and conformations. In both compounds, the keto group is in the s‐cis conformation and is almost planar. There are weak intramolecular interactions in both structures.     

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 paramagnetic precursor for polymeric supramolecular assemblies based on multiply bonded dimetal units: μ‐acetato‐aceto­nitrile­tris(μ‐N,N′‐di­phenyl­formamidinato)­di­ruthenium tetra­fluoro­borate di­chloro­methane hemisolvate

The title compound, [Ru₂(C₁₃H₁₁N₂)₃(C₂H₃O₂)(C₂H₃N)]BF₄·0.5CH₂Cl₂ or [Ru₂(μ‐DPhF)₃(μ‐O₂CMe)(MeCN)]BF₄·0.5CH₂Cl₂, where DPhF is N,N′‐diphenyl­formamidinate, crystallized as dark‐blue block‐shaped crystals. In the unit cell, the diruthenium cation lies on a general position, and the BF₄⁻ anions reside on two independent special positions with crystallographic twofold symmetry. Disorder was observed for one of the phenyl groups in the formamidinate ligand, the axial aceto­nitrile mol­ecule and the interstitial di­chloro­methane mol­ecule. The compound, which exhibits a long Ru—Ru bond of 2.4131 (5) Å, is the first {Ru₂}⁵⁺ formamidin­ate species that is both equatorially and axially functionalized so that it can be used as a precursor for polymeric paramagnetic supramolecular assemblies.     

Bis­[tris­(ethyl­enedi­amine)­cobalt(III)] di­chloro­bis­[μ‐(1‐hydroxy­ethyl­idene)­di­phospho­nato(4–)]­di­ruthenium(II,­III)­(Ru–Ru) chloride trihydrate

In the title compound, [Co(C₂H₈N₂)₃]₂[Ru₂(C₂H₄O₇P₂)₂Cl₂]Cl·3H₂O, the building unit contains two crystallographically independent dinuclear [Ru₂(hedp)₂Cl₂]⁵⁻ anions, where hedp [viz. (1‐hydroxy­ethyl­idene)­di­phospho­nate] serves as a bis‐chelating bridging ligand, two types of [Co(en)₃]³⁺ cations, one uncoordinated Cl⁻ anion and five water mol­ecules of crystallization. The [Ru₂(hedp)₂Cl₂]⁵⁻ anions are connected to one another, forming one‐dimensional chains along the a axis. The [Co(en)₃]³⁺ cations are located between these chains and lie across inversion centres. An extensive series of hydrogen bonds lead to the formation of a three‐dimensional supramol­ecular network structure, with channels generated along the [100] direction. The uncoordinated water mol­ecules and Cl⁻ anions reside in these channels.     

Bis­[2‐(di­phenyl­phosphinoyl)­benzene] di­sulfide

The title compound, [2‐Ph₂P(O)C₆H₄S]₂ or C₃₆H₂₈O₂P₂S₂, obtained by electrochemical oxidation of 2‐(di­phenyl­phosphino)­benzene­thiol, has twofold crystallographic symmetry. Principal dimensions include S—S 2.0212 (15) Å, S—C 1.786 (3) Å and C—S—S—C 81.34 (14)°.