Synthesis, crystal structures and magnetic properties of helical double-stranded three-dimensional network [Co(NO3)2(bpt)2·2CH3OH]n and two-dimensional network [Mn(NCS)2(bpt)3·H2O]n (bpt=N,N′-bis(3-pyridylmethyl)thiourea)

2002 ◽  
Vol 332 (1) ◽  
pp. 216-222 ◽  
Author(s):  
Gang Li ◽  
Hong-Wei Hou ◽  
Yun-Yin Niu ◽  
Yao-Ting Fan ◽  
Zhi-Shan Liu ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Crystal Structures ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Dimensional Network

Niedere Hydrate von Aminen. Kristallstrukturen der Hemihydrate von Ethyl- und Diethylamin sowie des Hemi- und Monohydrats von 1-Butylamin [1] / Lower Hydrates of Amines. Crystal Structures of the Hemihydrates of Ethyl- and Diethylamine and the Hemi- and Monohydrate of 1-Butylamine

1994 ◽  
Vol 49 (2) ◽  
pp. 243-249 ◽  
Author(s):  
Dietrich Mootz ◽  
Michael Born
Keyword(s):  
Crystal Structures ◽  
Three Dimensional ◽  
Structure Type ◽  
Membered Ring ◽  
Two Dimensional ◽  
Partial Structure ◽  
Dimensional Network ◽  
Analogous Composition ◽  
First Time ◽  
Hydrogen Bonded

The melting diagrams of three systems alkylamine- water have been reexamined and the crystal structures of four lower hydrates determined for the first time. The hydrate EtNH2 · 0.5 H2O , m.p. -72 °C, is triclinic with space group P1̄ and Z = 4 formula units per unit cell of dimensions a = 5.104, b = 8.137, c = 9.394 Å, α = 100.41, β = 98.41 and γ = 97.96° at -150°C. The O and N atoms are hydrogen-bonded into a two-dimensional array 2∞[ON6/3] analogous to the layer of the Cdl2 structure type. The hydrate Et2NH · 0.5 H2O , m.p. -20 °C, is monoclinic with 12/a, Z = 8 ,a - 8.324, b = 15.090, c = 10.006 Å and β - 103.34° at -100 °C. The O and N atoms are linked into a four-membered ring spiro chain 1∞[ON4/2] analogous to that in SiS2. The hydrate l-BuNH2 · 0.5H2O (m.p. -57 °C, monoclinic, P 21/c, Z = 8,a = 14.994, b = 5.086, c = 16.15 Å,β - 103.45° at -81 °C) contains essentially the same hydrogen-bonded array as the hydrate EtNH2-0.5 H2O (see above). l-BuNH2-H2O , the only monohydrate investigated besides the three hemihydrates (m.p. -60 °C, monoclinic, C 2/m, Z = 4, a = 9.68, b = 4.238, c = 15.58 Å, β = 94.9° at -81 °C), has also a two-dimensional H2O/NH2 partial structure, similar to a subset of the three-dimensional network of the adduct NH3 H2O of analogous composition.

scholarly journals Crystal structures of the three closely related compounds: bis[(1H-tetrazol-5-yl)methyl]nitramide, triaminoguanidinium 5-({[(1H-tetrazol-5-yl)methyl](nitro)amino}methyl)tetrazol-1-ide, and diammonium bis[(tetrazol-1-id-5-yl)methyl]nitramide monohydrate

2017 ◽  
Vol 73 (7) ◽  
pp. 1056-1061 ◽  
Author(s):  
Lauren A. Mitchell ◽  
Gregory H. Imler ◽  
Damon A. Parrish ◽  
Jeffrey R. Deschamps ◽  
Philip W. Leonard ◽  
...  
Keyword(s):  
Hydrogen Bonds ◽  
Crystal Structures ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Bond Lengths ◽  
Π Stacking ◽  
Dimensional Network ◽  
Compound Ii ◽  
Related Compounds ◽  
Molecular Salt

In the molecule of neutral bis[(1H-tetrazol-5-yl)methyl]nitramide, (I), C4H6N10O2, there are two intramolecular N—H...O hydrogen bonds. In the crystal, N—H...N hydrogen bonds link molecules, forming a two-dimensional network parallel to (-201) and weak C—H...O, C—H...N hydrogen bonds, and intermolecular π–π stacking completes the three-dimensional network. The anion in the molecular salt, triaminoguanidinium 5-({[(1H-tetrazol-5-yl)methyl](nitro)amino}methyl)tetrazol-1-ide, (II), CH9N6+·C4H5N10O2−, displays intramolecular π–π stacking and in the crystal, N—H...N and N—H...O hydrogen bonds link the components of the structure, forming a three-dimensional network. In the crystal of diammonium bis[(tetrazol-1-id-5-yl)methyl]nitramide monohydrate, (III), 2NH4+·C4H4N10O22−·H2O, O—H...N, N—H...N, and N—H...O hydrogen bonds link the components of the structure into a three-dimensional network. In addition, there is intermolecular π–π stacking. In all three structures, the central N atom of the nitramide is mainlysp2-hybridized. Bond lengths indicate delocalization of charges on the tetrazole rings for all three compounds. Compound (II) was found to be a non-merohedral twin and was solved and refined in the major component.

Crystal structures of tricalcium citrates

2018 ◽  
Vol 33 (2) ◽  
pp. 98-107 ◽  
Author(s):  
James A. Kaduk
Keyword(s):  
Crystal Structures ◽  
Density Functional ◽  
Three Dimensional ◽  
Water Molecules ◽  
Calcium Citrate ◽  
Powder Diffraction Data ◽  
Coordination Polyhedra ◽  
X Ray ◽  
Calcium Supplements ◽  
Dimensional Network

The crystal structures of calcium citrate hexahydrate, calcium citrate tetrahydrate, and anhydrous calcium citrate have been solved using laboratory and synchrotron X-ray powder diffraction data, and optimized using density functional techniques. Both the hexahydrate and tetrahydrate structures are characterized by layers of edge-sharing Ca coordination polyhedra, including triply chelated Ca. An additional isolated Ca is coordinated by water molecules, and two uncoordinated water molecules occur in the hexahydrate structure. The previously reported polymorph of the tetrahydrate contains the same layers, but only two H2O coordinated to the isolated Ca and two uncoordinated water molecules. Anhydrous calcium citrate has a three-dimensional network structure of Ca coordination polyhedra. The new polymorph of calcium citrate tetrahydrate is the major crystalline phase in several commercial calcium supplements.

scholarly journals 2-Amino-3-carboxypyridinium perchlorate

2012 ◽  
Vol 68 (6) ◽  
pp. o1601-o1602 ◽  
Author(s):  
Fadila Berrah ◽  
Sofiane Bouacida ◽  
Hayet Anana ◽  
Thierry Roisnel
Keyword(s):  
Hydrogen Bonds ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Asymmetric Unit ◽  
Dimensional Network

The asymmetric unit includes two crystallographically independent equivalents of the title salt, C6H7N2O2 +·ClO4 −. The cations and anions form separate layers alternating along the c axis, which are linked by N—H...O, O—H...O and C—H...O hydrogen bonds into a two-dimensional network parallel to (100). Further C—H...O contacts connect these layers, forming a three-dimensional network, in which R 4 4(20) rings and C 2 2(11) infinite chains can be identified.

scholarly journals Tris(1,10-phenanthroline-κ2 N,N′)cobalt(II) bis(2,4,5-tricarboxybenzoate) monohydrate

IUCrData ◽  
2019 ◽  
Vol 4 (1) ◽  
Author(s):  
Kai-Long Zhong ◽  
Guo-Qing Cao ◽  
Wei Song ◽  
Chao Ni
Keyword(s):  
Hydrogen Bonds ◽  
Network Structure ◽  
Rotation Axis ◽  
Complex Cation ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Dimensional Network ◽  
Distorted Octahedral

In the complex cation of the title salt, [Co(C12H8N2)3](C10H5O8)2·H2O, the CoII cation is situated on a twofold rotation axis and is coordinated in a distorted octahedral manner by six N atoms from three chelating 1,10-phenanthroline (phen) ligands. In the crystal, the non-coordinating 2,4,5-tricarboxybenzoate anions interact with each other via O—H...O hydrogen bonds, generating a two-dimensional network parallel to (100). Adjacent sheets are connected by waterO—H...Ocarboxylate hydrogen bonds, resulting in a three-dimensional network structure that surrounds the complex cations.

Two polymorphs of 2-ethyl-3-hydroxy-6-methylpyridinium hydrogenN-acetyl-L-glutamate from powder diffraction data

2013 ◽  
Vol 69 (12) ◽  
pp. 1549-1552 ◽  
Author(s):  
Vladimir V. Chernyshev ◽  
Sergey Y. Efimov ◽  
Ksenia A. Paseshnichenko ◽  
Andrey A. Shiryaev
Keyword(s):  
Hydrogen Bonds ◽  
Crystal Structures ◽  
Powder Diffraction ◽  
Diffraction Data ◽  
Crystal Packing ◽  
Three Dimensional ◽  
Powder Diffraction Data ◽  
Screw Axis ◽  
Dimensional Network ◽  
Polymorphic Modifications

The title salt, C8H12NO+·C7H10NO5−, crystallizes in two polymorphic modifications,viz.monoclinic (M) and orthorhombic (O). The crystal structures of both polymorphic modifications have been established from laboratory powder diffraction data. The crystal packing motifs in the two polymorphs are different, but the conformations of the anions are generally similar. InM, the anions are linked by pairs of hydrogen bonds of the N—H...O and O—H...O types into chains along theb-axis direction, and neighbouring molecules within the chain are related by the 21screw axis. The cations link these chainsviaO—H...O and N—H...O hydrogen bonds into layers parallel to (001). InO, the anions are linked by O—H...O hydrogen bonds into helices along [001], and neighbouring molecules within the helix are related by the 21screw axis. The neighbouring helical turns are linked by N—H...O hydrogen bonds. The cations link the helicesviaO—H...O and N—H...O hydrogen bonds, thus forming a three-dimensional network.

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