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ISSN: 2414-3146

October 2017 issue

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Cover illustration: The mol­ecular structure of [Ti2Cl2(C6H18NSi2)4] shows a binuclear motif of TiIII atoms, formulated as [Ti([mu]-Cl)(N(SiMe3)2)2]2, with two [mu]-Cl atoms bridging two ((Me3Si)2N)2Ti moieties. The coordination environment of both central TiIII atoms is distorted tetra­hedral, with a nearly planar four-membered Ti2Cl2 core [Ti-Cl-Ti-Cl = 2.796 (15)°]. See: Quadri, Törnroos & Le Roux [IUCrData (2017). 2, x171488].

metal-organic compounds


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The mol­ecular structure of the title compound, [FePt(CN)4(C14H8N2)2(H2O)2]n, consists of one-dimensional polymeric [–Fe–NC–Pt(CN)2–CN–] chains. Two water mol­ecules and two monodentate 1,4-bis­(pyridin-4-yl)buta-1,3-diyne (bpb) ligand mol­ecules complete the octa­hedral coordination sphere of the FeII atoms. The water mol­ecules are hydrogen bonded to either bpb ligands or cyanide groups of the planar [Pt(CN)4]2− anion of adjacent polymeric chains.

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In the title compound, iridium adopts a distorted square-planar geometry and is coordinated to cyclo­octa­diene, a triphenyl phosphane, and a N-heterocyclic carbene ligands in the cationic complex with tetra­fluorido­borate as the counter-anion.

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In the title linear polymeric structure, the Sn atom is five-coordinated by three methyl C atoms and two methyl­phenyl­phosphinate O atoms in a distorted trigonal–bipyramidal geometry.

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Glutarate ligands bridge dinuclear Cu2 units to form one-dimensional chains and 1,4-bis­(pyridin-4-yl)butane ligands connect these chains to form a two-dimensional layer structure. Carboxyl­ates of a glutarate ligand bridge two copper(II) ions, forming a paddle-wheel-type Cu2(CO2)4 dinuclear secondary building unit.

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In the polymeric chain structure of the title compound, {(Me3Sn)[C6H3F2(SeOO)]}n, the SnIV atom adopts a distorted trigonal–bipyramidal coordination environment.

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The two TiIII atoms in the binuclear title compound are each tetra­hedrally coordinated by two bridging Cl atoms and two N atoms of (tri­methyl­sil­yl)amido moieties.

organic compounds


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Acetyl­hydroxamic acid can exist in two tautomeric forms, i.e. amide and imide. Each of these forms may be in the form of the Z or E isomer. The title compound is formed by the reaction of acetamide and hydroxyl­amine hydro­chloride. In the crystal, mol­ecules are connected by N—H⋯O and O—H⋯O hydrogen bonds, forming in chains in the c-axis direction.

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In the title compound, C10H17NO3, the five-membered ring is in a slightly twisted envelope conformation. In the crystal, mol­ecules are linked via N—H⋯O hydrogen bonds forming C(4) chains along [001].

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In the title compound, C15H27NO4, the cyclo­pentane ring adopts an envelope conformation with the methyl­ene group as the flap. The dihedral angle between the cyclo­propane and cyclo­pentane rings is 77.54 (13)°. In the crystal, mol­ecules are linked via O—H⋯O hydrogen bonds, forming C(7) chains propagating along [010].

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The relative stereochemistry of the title compound, C17H24O2, has been confirmed by the X-ray analysis. The seven-membered ring is in a pseudo-boat conformation with both meth­oxy substituents in equatorial sites.

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The crystal structure of a di­bromo­hydrazono­methyl­phenol, prepared from di­bromo­hydroxy­benzaldehyde and hydrazine hydrate, is reported.

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In the title compound, the dihedral angle between the planes of the benzene and pyridine rings is 55.30 (13)°. In the crystal, mol­ecules are linked by O—H⋯O and C—H⋯O hydrogen bonds, forming a three-dimensional framework.

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The pyrazolo­pyrimidine unit is slightly twisted while π-stacking inter­actions between pyrimidine moieties form centrosymmetric dimers. Offset π-stacking inter­actions between dimers form chains along the b-axis direction.

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The di­hydro­quinoxaline moiety deviates from planarity with a dihedral angle of 1.52 (16)° between the constituent rings. In the crystal, zigzag chains are generated by N—H⋯N and N—H⋯Cl hydrogen bonds and are extended into sheets parallel to (100) by N—H⋯O hydrogen bonds.

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The title compound crystallizes with two mol­ecules in the asymmetric unit, one of which features a disordered ethyl side chain.

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In the hydrated cocrystal of cis-1,3-cyclo­hexa­nedi­carb­oxy­lic acid (H2cdc) and N,N′-(pentane-1,5-di­yl)bis­(pyridine-4-carboxamide)­pentane (bpcpe), O—H⋯N hydrogen bonding inter­actions produce supra­molecular chains.


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The mol­ecular structure of N,N,N-tris­(di­phenyl­phospho­rylmeth­yl)amine exhibits threefold symmetry which is not reflected in the solid state structure.

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In the crystal of the hybrid imine/urea mol­ecule, N—H⋯O hydrogen bonds link mol­ecules into supra­molecular helical chains parallel to the c axis via an R_{1}^{2}(6) ring motif.

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The asymmetric unit of the title compound contains two independent mol­ecules differing in the orientation of the propargyl side chain.

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The title compound features dimers linked by four C—H⋯O hydrogen bonds.

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In the title mol­ecule,the piperidine ring assumes a chair conformation. The dihedral angle between the mean plane of the piperidine ring and the benzene ring is 45.49 (1)°. In the crystal, mol­ecules are linked by O—H⋯O hydrogen bonds, leading to a mol­ecular chain running along the c-axis direction.

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The title compound, which crystallizes with two mol­ecules in the asymmetric unit, was obtained in the course of the total synthesis of curvicollides A–C and fusaequisin A. It features the relative configuration of the western aldol part of the natural products. In the crystal, mol­ecules are linked by C—H⋯O hydrogen bonds.

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The structure of the title imidazolidinedione derivative is reported. The crystal packing is stabilized by N—H⋯O and C—H⋯π(ring) hydrogen bonds.

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The title compound is a condensation product of 3-amino-2-chloro­pyridine and ethyl 2-amino­benzoate in which the aromatic rings are almost coplanar [dihedral angle = 2.28 (9)°] and an intra­molecular N—H⋯O hydrogen bond occurs. In the crystal, N—H⋯O and N—H⋯N hydrogen bonds link the mol­ecules into (100) sheets.

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This compound was prepared by bromination/de­hydro­bromination of E,E,Z-cyclo­dodeca­triene. The crystal is composed of C2-symmetrical mol­ecules with an E conformation of the bromo­alkene fragments and nearly linear alkyne units. The torsion angles in the ring suggest significant ring strain.

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In the title compound, the mean plane of the thia­zole ring subtends dihedral angles of 3.6 (2) and 79.9 (2)° with the bromo­benzyl and toluyl rings, respectively. In the crystal, short S⋯O contacts [3.012 (3) Å] and aromatic π–π stacking between the thia­zole and toluyl rings [centroid–centroid separation = 3.687 (2) Å] are observed.

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The mol­ecular and crystal structures of a tryptophane derivative are reported. The packing features N—H⋯O hydrogen bonds and N—H⋯π and C—H⋯π inter­actions.
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