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Journal logoCRYSTALLOGRAPHIC
COMMUNICATIONS
ISSN: 2056-9890

March 2015 issue

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Cover illustration: The reaction of bis-(anthracene)cobaltate(-I) with excess cycloheptatriene resulted in a new 18-electron cobaltate containing two different seven-membered ring ligands. The asymmetric unit contains two independent cation-anion pairs of the title complex, [K(18-crown-6)][Co([eta]3-C7H7)([eta]5-C7H9)], where 18-crown-6 is 1,4,7,10,13,16-hexaoxacyclooctadecane. This compound is of interest as the first to possess cycloheptatrienyl and cycloheptadienyl ligands in an anionic metal complex. See: Brennessel & Ellis [Acta Cryst. (2015). E71, 291-295].

research communications


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The title compound, [Rh(η5-C5Me5)Cl(C13H12ClN3)]Cl, is chiral at the metal and crystallizes as a racemate. Upon coordination, the hydrazinyl­idene­pyridine ligand is non-planar, an angle of 54.42 (7)° being observed between the pyridine ring and the aromatic ring of the [2-(4-chloro­phen­yl)hydrazin-1-yl­idene]ethyl group.

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Single crystals of the langbeinite-related phosphate Rb0.743K0.845Co0.293Ti1.707(PO4)3 have been prepared by crystallization of high-temperature self-flux K2O–Rb2O–P2O5–TiO2–CoO.

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The crystal structure of ALLN, the tripeptidic inhibitor of proteasomes, is solved from synchrotron diffraction data. An infinite β-sheet extended through the crystal is formed by symmetry-related oligopeptide mol­ecules in extended conformation.

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The crystal structure of the title compound displays a twist conformation of the imidazolidine ring with two (2-hy­droxy­naphthalen-1-yl)methyl substituents stabilized by two intra­molecular O—H⋯N hydrogen bonds.

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The title compound is non-planar, with the mean plane of the pyrene ring system and the terminal N-phenyl ring being inclined to the central p-phenyl­enedi­amine ring by 29.34 (4) and 43.43 (7)°, respectively. In the crystal, mol­ecules are linked by a number of weak N—H⋯π, C—H⋯π and π–π inter­actions [inter-centroid distances = 3.5569 (11)–3.708 (1) Å], forming slabs lying parallel to (30\overline{4}).

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In the related title compounds, (1) and (2), the 3-thia­zolidine ring pucker is twisted on the S—Cmethine bond in (1), while in (2), the ring has an envelope conformation with the S atom as the flap. In the crystal of (1), mol­ecules are linked by C—H⋯O hydrogen bonds forming chains along [100], while in the crystal of (2), mol­ecules are linked by C—H⋯O and C—H⋯Cl hydrogen bonds forming slabs parallel to (001).

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A compound, (CH6N3)7H9[PtMo6O24]2·7H2O, containing the well-known Anderson-structure heteropolyoxomolybdate, was obtained by recrystallization of its powdered guanidinium salt. The protonated O atoms in the polyanion were confirmed by electron-density maps, inter­polyanion hydrogen bonds and bond-valance sums (BVS).

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A new imidazole-based zinc complex, synthesized using hydro­thermal methods, exhibits luminescent behaviour.


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The mixed-metal thio­phosphate Nb1.18V0.82PS10 has been prepared by the use of a halide flux and the crystal structure has been analyzed by single-crystal diffraction methods.

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In the title compound, the deprotonated guanine mol­ecules are arranged in centrosymmetric pairs, and form hydrogen bonds with the neighboring water mol­ecules.

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1-(2-Hy­droxy­eth­yl)-2-methyl-5-nitro-1H-imidazole (metronidazole, MET) reacts with AgBF4 to give [Ag(MET)2]BF4, in which the Ag atom is coordinated by two MET ligands with a trans arrangement.

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The CrIII ion in the title complex is coordinated by two 1,10-phenanthroline (phen) ligands, one water mol­ecule and a chloride in a cis geometry, displaying a distorted octa­hedral environment. The [ZnCl4]2− anion has a slightly distorted tetra­hedral coordination geometry.

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The reaction of bis­(anthracene)cobaltate(−I) with excess cyclo­hepta­triene, C7H8, resulted in a new 18-electron cobaltate containing two different seven-membered ring ligands, based on single-crystal X-ray diffraction. This compound is of inter­est as the first to possess cyclo­hepta­trienyl and cyclo­hepta­dienyl ligands in an anionic metal complex.

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The packing of the title compound features N—H⋯N hydrogen bonds, which form inversion dimers, and weak aromatic π–π stacking inter­actions.

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A new silver aluminium trimangan­ese penta­molybdate, AgMnII3(MnIII0,26Al0,74)(MoO4)5, is composed of M2O10 dimers, M3O14 (M = Mn, Al) trimers and MoO4 tetra­hedra sharing corners and forming three types of layers. A comparative structural description is provided with the structures of related phases containing dimers, trimers and tetra­mers.

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The title compounds, (I) and (II), are hydrazinecarbo­thio­amide derivatives. In the crystal of (I), two independent mol­ecules are linked by bifurcated N—H⋯O and C—H⋯O hydrogen bonds, forming two R_{2}^{1}(6) ring motifs, and R_{2}^{2}(10) and R_{2}^{2}(14) ring motifs. In the crystal of (II), mol­ecules are linked by pairs of N—H⋯S hydrogen bonds, forming inversion dimers with an R_{2}^{2}(8) ring motif.

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The hemi-diethyl etherate of the square pyramidal copper complex, 1-butene-bis­(pyridin-2-ylmeth­yl)amine copper(II) chloride is reported. The basal plane consists of the three nitro­gen atoms from the ligand and one chlorine. The second chlorine occupies the apical position of the square pyramid.

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In the title compound, the imidizadoline ring adopts an envelope conformation and the nitro­gen lone pairs are oriented in a syn disposition. The crystal packing is stabilized by C—H⋯O hydrogen-bonding inter­actions.

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In the title compound, C15H15N3OS, intra­molecular N—H⋯O and C—H⋯S hydrogen bonds both generate S(6) rings. The C=O and C=S bonds lie to opposite sides of the mol­ecule. In the crystal, inversion dimers linked by pairs of N—H⋯S hydrogen bonds generate R_{2}^{2}(8) loops.

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The title compound was synthesized using solid-state reaction and characterized by X-ray diffraction. The structure crystallizes in an own structure type which is a commensurate superstructure of an underlying B8-type substructure.

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The title complex, [Mg(C7H7N4O2)2(H2O)4], lies across an inversion centre and the MgII atom is coordinated in a slightly distorted octa­hedral environment by four aqua ligands in the equatorial sites and imidazole ring N atoms in the axial sites. In the crystal, O—H⋯O and O—H⋯N hydrogen bonds link complex mol­ecules, forming a three-dimensional network incorporating R_{4}^{2}(8) and R_{2}^{2}(18) graph-set motifs.

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The dinuclear title compound crystallizes as a dimer forming a tetra­nuclear copper(II) complex, [Cu4(CH3O)4(C11H13O2)4], in the solid state. In this complex, all CuII atoms have a square-pyramidal coordination sphere, with long axial and short basal Cu—O distances.

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The first crystal structure determination of 1-bromo-2-(phenyl­selen­yl)benzene is presented. The mol­ecules form weak dimers through displaced parallel π-stacking inter­actions.

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inorganic compounds


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Research communications

The first papers in this new format were published in July 2014. Research communications are longer papers with new text sections designed to help authors bring out the science behind their structure determinations. Figures are included in the published paper and, for the first time in Acta E, individual reports are not limited to single structure determinations. The Research communications format will make Acta E the natural home for structure determinations with interesting science to report.

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