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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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Acta Cryst. (2015). E71, o183
doi: 10.1107/S2056989015002765