scholarly journals Dilead(II) trimanganese(II) bis(hydrogenphosphate) bis(phosphate)

2012 ◽  
Vol 68 (8) ◽  
pp. i66-i66 ◽  
Author(s):  
Abderrazzak Assani ◽  
Mohamed Saadi ◽  
Mohammed Zriouil ◽  
Lahcen El Ammari
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Hydrothermal Method ◽  
Title Compound ◽  
The Other ◽  
Inversion Center

The title compound, Pb2Mn3(HPO4)2(PO4)2, was synthesized by a hydrothermal method. All atoms are in general positions except for one Mn atom which is located on an inversion center. The framework of the structure is built up from PO4tetrahedra and two types of MnO6octahedra, one almost ideal and the other very distorted with one very long Mn—O bond [2.610 (4) Å compared an average of 2.161 Å for the other bonds]. The centrosymetric octahedron is linked to two distorted MnO6octahedra by an edge common, forming infinite zigzag Mn3O14chains running along thebaxis. Adjacent chains are linked by PO4and PO3(OH) tetrahedra through vertices or by edge sharing, forming sheets perpendicular to [100]. The Pb2+cations are sandwiched between the layers and ensure the cohesion of the crystal structure. O—H...O hydrogen bonding between the layers is also observed.

Redetermination of trans-diaquabis(picolinato-κ2 N,O)cobalt(II) dihydrate

2006 ◽  
Vol 62 (4) ◽  
pp. m796-m798 ◽  
Author(s):  
Zerrin Heren ◽  
Cem Cüneyt Ersanlı ◽  
Cem Keser ◽  
Nazan Ocak Ískeleli
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Title Compound ◽  
Three Dimensional ◽  
Water Molecules ◽  
Inversion Center ◽  
Hydrogen Bonding Interactions ◽  
Dimensional Network ◽  
Distorted Octahedral

The crystal structure of the title compound, [Co(C6H4NO2)2(H2O)2]·2H2O, has been reinvestigated with improved precision [previous reports: Chang et al. (1972). J. Coord. Chem. 2, 31–34; Lumme et al. (1969). Suom. Kemistil. B, 42, 270]. In the title compound, the Co atom is located on an inversion center and its coordination can be described as slightly distorted octahedral, equatorially trans-coordinated by two N and O atoms of two picolinate ligands and axially coordinated by two O atoms of the water molecules. Intermolecular O—H...O and C—H...O hydrogen-bonding interactions result in the formation of an intricate three-dimensional network.

Structure of [(CH3)2NH2]2CoCl4 at elevated temperatures

1999 ◽  
Vol 55 (5) ◽  
pp. 752-757 ◽  
Author(s):  
Amir H. Mahmoudkhani ◽  
Vratislav Langer
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Phase Transitions ◽  
Physical Properties ◽  
Electric Conductivity ◽  
Title Compound ◽  
Structural Changes ◽  
Elevated Temperatures ◽  
The Other ◽  
Cell Parameters

The crystal structure of the title compound, dimethylammonium tetrachlorocobaltate(II), has been determined at four temperatures between 297 and 366 K, in order to investigate possible phase transitions at 313 and 353 K [Kapustianik, Polovinko & Kaluza et al. (1996). Phys. Status Solidi A, 153, 117–122]. We found that there is no significant change either in the hydrogen-bonding network or in the cell parameters, apart from a linear dilatation with temperature. This study reveals that the anomalous variation in electric conductivity and some of the other physical properties of the compound cannot be explained by structural changes.

catena-Poly[[dichlorozinc(II)]-μ-1,2-di-4-pyridylethylene-κ2 N:N′]

2007 ◽  
Vol 63 (3) ◽  
pp. m717-m718 ◽  
Author(s):  
Chuang-Ye Qin ◽  
Jing-Wei Xu
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Title Compound ◽  
Polymeric Chain ◽  
Coordination Geometry ◽  
Inversion Center ◽  
Tetrahedral Coordination

In the title compound, [ZnCl2(C12H10N2)] n , the ZnII ion displays a tetrahedral coordination geometry. Each 1,2-di-4-pyridylethylene ligand is located on an inversion center and bridges ZnII ions, forming a zigzag polymeric chain. Weak C—H...Cl hydrogen bonding is observed in the crystal structure.

scholarly journals Crystal structure of 8-(4-methylphenyl)-2′-deoxyadenosine hemihydrate

2018 ◽  
Vol 74 (1) ◽  
pp. 1-5 ◽  
Author(s):  
Ajaykumar V. Ardhapure ◽  
Yogesh S. Sanghvi ◽  
Yulia Borozdina ◽  
Anant Ramakant Kapdi ◽  
Carola Schulzke
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Water Molecule ◽  
Title Compound ◽  
Crystal Packing ◽  
The Other ◽  
Independent Molecule ◽  
Asymmetric Unit ◽  
Solvent Water ◽  
Independent Molecules

In the asymmetric unit, equalling the unit cell (triclinic,P1,Z= 1), two molecules of the title compound, 8-(4-methylphenyl)-D-2′-deoxyadenosine, C17H19N5O3, are present, with distinct conformations of the two sugar moieties, together with one solvent water molecule. All three ribose O atoms are involved in hydrogen bonding and the crystal packing is largely determined by hydrogen-bonding or hydrogen–heteroatom interactions (O—H...O, O—H...N, N—H...O, C—H...O and C—H...N) with one independent molecule directly linked to four neighbouring molecules and the other molecule directly linked to six neighbouring molecules. The two independent molecules of the asymmetric unit display three weak intramolecular C—H-to-heteroatom contacts, two of which are very similar despite the different conformations of the deoxyribosyl moieties. The aromatic ring systems of both molecules are in proximity to each other and somehow aligned, though not coplanar. The absolute structures of the two molecules were assumed with reference to the reactant 8-bromo-D-2′-deoxyadenosine as they could not be determined crystallographically.

scholarly journals K2[FeII 3(P2O7)2(H2O)2]

2012 ◽  
Vol 68 (6) ◽  
pp. i47-i48 ◽  
Author(s):  
Juan Yang ◽  
Xin Zhang ◽  
Biao Liu ◽  
Wei Sun ◽  
Ya-Xi Huang
Keyword(s):  
Crystal Structure ◽  
Water Molecule ◽  
Network Structure ◽  
Title Compound ◽  
General Position ◽  
Interlayer Space ◽  
Negative Charge ◽  
The Other ◽  
Inversion Center ◽  
Solvothermal Conditions

The title compound, dipotassium diaquabis(diphosphato)triferrate(II), K2[FeII 3(P2O7)2(H2O)2], was synthesized under solvothermal conditions. The crystal structure is isotypic with its Co analogue. In the structure, there are two crystallographically distinct Fe positions; one lies on an inversion center, the other on a general position. The first Fe2+ cation adopts a regular octahedral coordination with six O atoms, whereas the other is coordinated by five O atoms and a water molecule. The [FeO6] octahedron shares its trans-edges with an adjacent [FeO5(H2O)] octahedron; in turn, the [FeO5(H2O)] octahedron shares skew-edges with a neighbouring [FeO6] octahedron and an [FeO5(H2O)] octahedron, resulting in a zigzag octahedral chain running along [001]. The zigzag chains are linked to each other by the P2O7 diphosphate groups, leading to a corrugated iron diphosphate layer, [Fe3(P2O7)2(H2O)2]2−, parallel to (100). The interlayer space is occupied by K+ cations, which adopt an eight-coordination to seven O atoms and one water molecule from a neighbouring iron diphosphate layer. Thus, the K+ ions not only compensate the negative charge of the layer but also link the layers into a network structure.

scholarly journals The crystal structure of bis[(E)-4-bromo-2-({[2-(pyridin-2-yl)ethyl]imino}methyl)phenol]nickel(II) bis[(E)-4-bromo-2-({[2-(pyridin-2-yl)ethyl]imino}methyl)phenolato]nickel(II) bis(perchlorate) methanol monosolvate, a structure containing strong inter-species hydrogen bonds

2018 ◽  
Vol 74 (8) ◽  
pp. 1121-1125
Author(s):  
Ugochukwu Okeke ◽  
Raymond Otchere ◽  
Yilma Gultneh ◽  
Ray J. Butcher
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Three Dimensional ◽  
The Other ◽  
Hydroxyl Groups ◽  
Charge Balance ◽  
Complex Molecules ◽  
Two Component

The title compound, [Ni(C14H12BrN2O)2][Ni(C14H13BrN2O)2](ClO4)2·CH3OH consists of two mononuclear ([Ni(HL)2]2+ and [NiL 2]) complex molecules linked by strong hydrogen bonding [O...O separations of only 2.430 (5) Å], which is the shortest reported to date for such species. In one of the complexes, both the coordinated phenoxy groups retain their protons and thus this is the cationic equivalent species of the other complex where both coordinated phenoxy groups are deprotonated. In addition, perchlorate anions are present for charge balance, as well as methanol solvate molecules. For the neutral NiL 2 complex, each 2-ethylaminepyridine arm is disordered over two equivalent conformations with occupancies of 0.750 (8):0.250 (8). The perchlorate anion is disordered over two equivalent conformations with occupancies of 0.602 (8):0.398 (8). The perchlorate ions also link to the H atoms on the methanol methyl and hydroxyl groups. These interactions link the moieties into a complex three-dimensional array. The crystal studied was refined as a two-component twin.

scholarly journals Crystal structure ofcatena-poly[diammonium [di-μ-oxalato-cuprate(II)]]

2016 ◽  
Vol 72 (12) ◽  
pp. 1780-1782 ◽  
Author(s):  
Diane A. Dickie ◽  
Richard A. Kemp
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Title Compound ◽  
Three Dimensional ◽  
Inversion Center ◽  
Polymeric Structure ◽  
Dimensional Network

The structure of the title compound, {(NH4)2[Cu(C2O4)2]}n, at 100 K has monoclinic (P21/c) symmetry with the CuIIatom on an inversion center. The compound has a polymeric structure due to long Cu...O interactions which create [Cu(C2O4)2] chains along theaaxis. The structure also displays intermolecular N—H...O hydrogen bonding, which links these chains into a three-dimensional network.

scholarly journals Synthesis and crystal structure of tricarbonylchlorido{1-[(pyridin-2-ylmethylidene)amino]adamantane}rhenium(I)

2016 ◽  
Vol 72 (9) ◽  
pp. 1276-1279 ◽  
Author(s):  
Jorge Jimenez ◽  
Indranil Chakraborty ◽  
Pradip Mascharak
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Coordination Sphere ◽  
Title Compound ◽  
The Other ◽  
Equimolar Ratio ◽  
Synthesis And Crystal Structure ◽  
Hydrogen Bonding Interactions ◽  
Pharmacokinetic Properties ◽  
Chloride Ligand

The title compound, [ReCl(pyAm)(CO)3], where pyAm is 1-[(pyridin-2-ylmethylidene)amino]adamantane (C16H20N2), was synthesized from the reaction of [ReCl(CO)5] and pyAm in an equimolar ratio. The ReIatom resides in an octahedral C3ClN2coordination sphere. The Re—C bondtransto the chloride ligand is noticeably longer compared to the other two Re—C distances. Weak C—H...Cl hydrogen-bonding interactions consoldiate the packing of the molecules. In this design, the pyAm ligand was employed due to its well-known pharmacokinetic properties.

scholarly journals Hydrogen-bonding patterns in 5-fluorocytosine–melamine co-crystal (4/1)

2016 ◽  
Vol 72 (4) ◽  
pp. 552-555 ◽  
Author(s):  
Marimuthu Mohana ◽  
Packianathan Thomas Muthiah ◽  
Liurukara D. Sanjeewa ◽  
Colin D. McMillen
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
The Other ◽  
Amino Group ◽  
Stacking Interactions ◽  
Asymmetric Unit ◽  
Twofold Axis ◽  
Ring Motif

The asymmetric unit of the title compound, 4C4H4FN3O·C3H6N6, comprises of two independent 5-fluorocytosine (5FC) molecules (AandB) and one half-molecule of melamine (M). The other half of the melamine molecule is generated by a twofold axis. 5FC moleculesAandBare linked through two different homosynthons [R22(8) ring motif]; one is formedviaa pair of N—H...O hydrogen bonds and the secondviaa pair of N—H...N hydrogen bonds. In addition to this pairing, the O atoms of 5FC moleculesAandBinteract with the N2 amino group on both sides of the melamine molecule, forming aDDAAarray of quadruple hydrogen bonds and generating a supramolecular pattern. The 5FC (moleculesAandB) and two melamine molecules interactviaN—H...O, N—H...N and N—H...O, N—H...N, C—H...F hydrogen bonds formingR66(24) andR44(15) ring motifs. The crystal structure is further strengthened by C—H...F, C—F...π and π–π stacking interactions.

scholarly journals (Z)-4-Bromo-N-{(Z)-3-[(4-bromo-2,6-diisopropylphenyl)imino]butan-2-ylidene}-2,6-diisopropylaniline

2013 ◽  
Vol 69 (2) ◽  
pp. o216-o216
Author(s):  
Cun Zhang ◽  
Guo-Fan Wu ◽  
Bao-Mei Huang ◽  
Xiao-Quan Lu
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Benzene Ring ◽  
Dihedral Angle ◽  
Title Compound ◽  
Inversion Center ◽  
Aromatic Stacking ◽  
Compound C ◽  
Butyl Group

The title compound, C28H38Br2N2, is centrosymmetric with the mid-point of the central C—C bond of the butyl group located on an inversion center. The terminal benzene ring is approximately perpendicular to the central 1,4-diazabutadiene mean plane [dihedral angle = 78.23 (3)°]. No hydrogen bonding or aromatic stacking is observed in the crystal structure.

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