ChemInform Abstract: Sr3PbNiO6: Trigonal Prismatic Lead in a Novel Inverse K4CdCl6-Type Pseudo-One-Dimensional Oxide.

ChemInform ◽  
2010 ◽  
Vol 31 (2) ◽  
pp. no-no
Author(s):  
Mark D. Smith ◽  
Judith K. Stalick ◽  
Hans-Conrad zur Loye
Keyword(s):  
One Dimensional ◽  
Trigonal Prismatic

A novel three-dimensional CdIIcoordination polymer: poly[[aquabis(2,2′-bipyridine)(μ5-pyrazol-1-ide-3,5-dicarboxylato)(μ4-pyrazol-1-ide-3,5-dicarboxylato)(μ3-pyrazole-3,5-dicarboxylato)tetracadmium(II)] dihydrate]

2012 ◽  
Vol 68 (3) ◽  
pp. m76-m79
Author(s):  
Chunhua Fan ◽  
Yanfeng Yue ◽  
Zhengliang Lu
Keyword(s):  
Dicarboxylic Acid ◽  
Three Dimensional ◽  
Monoclinic Space Group ◽  
One Dimensional ◽  
Coordination Numbers ◽  
Distorted Octahedral ◽  
Anionic Ligands ◽  
Coordination Framework ◽  
Coordinated Water ◽  
Trigonal Prismatic

The title compound, {[Cd4(C5H2N2O4)(C5HN2O4)2(C10H8N2)2(H2O)]·2H2O}n, crystallized in the monoclinic space groupP21/nand displays a three-dimensional architecture. The asymmetric unit is composed of four crystallographically independent CdIIcentres, two triply deprotonated pyrazole-3,5-dicarboxylic acid molecules, one doubly deprotonated pyrazole-3,5-dicarboxylic acid molecule, two 2,2′-bipyridine ligands, one coordinated water molecule and two interstitial water molecules. Interestingly, the CdIIcenters exhibit two different coordination numbers. Two CdIIcentres adopt a distorted octahedral arrangement and a third a trigonal–prismatic geometry, though they are all hexacoordinated. However, the fourth CdIIcenter is heptacoordinated and displays a pentagonal–bipyramidal geometry. The three anionic ligands adopt μ3-, μ4- and μ5-bridging modes, first linking CdIIcenters into a one-dimensional wave-like band, then into a wave-like layer and finally into a three-dimensional coordination framework, which is stabilized by hydrogen bonds.

The two-dimensional coordination polymer poly[diaqua(μ2-1H-imidazo[4,5-f][1,10]phenanthroline)-μ4-sulfato-μ3-sulfato-dicadmium(II)]

2014 ◽  
Vol 70 (8) ◽  
pp. 770-772 ◽  
Author(s):  
Xiao-Min Hao ◽  
Gang Chen ◽  
Chang-Sheng Gu ◽  
Ji-Wei Liu
Keyword(s):  
Coordination Polymer ◽  
Three Dimensional ◽  
Supramolecular Network ◽  
Two Dimensional ◽  
Coordination Environment ◽  
One Dimensional ◽  
Distorted Octahedral Coordination ◽  
Distorted Octahedral ◽  
Trigonal Prismatic ◽  
Distorted Octahedral Coordination Environment

In the title coordination polymer, [Cd2(SO4)2(C13H8N4)(H2O)2]n, there are two crystallographically independent CdIIcentres with different coordination geometries. The first CdIIcentre is hexacoordinated by four O atoms of four sulfate ligands, one water O atom and one N atom of a 1H-imidazo[4,5-f][1,10]phenanthroline (IP) ligand, giving a distorted octahedral coordination environment. The second CdIIcentre is heptacoordinated by four O atoms of three sulfate ligands, one water O atom and two N atoms of one chelating IP ligand, resulting in a distorted monocappedanti-trigonal prismatic geometry. The symmetry-independent CdIIions are bridged in an alternating fashion by sulfate ligands, forming one-dimensional ladder-like chains which are connected through the IP ligands to form two-dimensional layers. These two-dimensional layers are linked by interlayer hydrogen bonds, leading to the formation of a three-dimensional supramolecular network.

scholarly journals Crystal structure of the BaII-based CoII-containing one-dimensional coordination polymer poly[[aqua{μ4-2,2′-[(4,10-dimethyl-1,4,7,10-tetraazacyclododecane-1,7-diyl)bis(methylidene)]bis(4-oxo-4H-pyran-3-olato)}perchloratocobaltbarium] perchlorate]

2017 ◽  
Vol 73 (12) ◽  
pp. 1806-1811 ◽  
Author(s):  
Paola Paoli ◽  
Eleonora Macedi ◽  
Patrizia Rossi ◽  
Luca Giorgi ◽  
Mauro Formica ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Coordination Polymer ◽  
Hydrogen Bonds ◽  
Water Molecule ◽  
Title Compound ◽  
Macrocyclic Ligand ◽  
Asymmetric Unit ◽  
One Dimensional ◽  
Trigonal Prismatic ◽  
Oxygen Atoms

The title compound, {[Ba{Co(H-2L1)}(ClO4)(H2O)]ClO4}n,L1 =4,10-bis[(3-hydroxy-4-pyron-2-yl)methyl]-1,7-dimethyl-1,4,7,10-tetraazacyclododecane, is a one-dimensional coordination polymer. The asymmetric unit consists of a {Ba[Co(H–2L1)](ClO4)(H2O)}+cationic fragment and a non-coordinating ClO4−anion. In the neutral [Co(H–2L1)] moiety, the cobalt ion is hexacoordinated in a trigonal–prismatic fashion by the surrounding N4O2donor set. The Ba2+ion is nine-coordinated and exhibits a distorted [BaO9] monocapped square-antiprismatic geometry, the six oxygen atoms coming from three distinct [Co(H–2L1)] moieties, while the remaining three vertices are occupied by the oxygen atoms of a bidentate perchlorate anion and a water molecule. A barium–μ2-oxygen motif develops along theaaxis, connecting symmetry-related dinuclear BaII–CoIIcationic fragments in a wave-like chain, forming a one-dimensional metal coordination polymer. Non-coordinating ClO4−anions are located in the space between the chains. Weak C—H...O hydrogen bonds involving both coordinating and non-coordinating perchlorate anions build the whole crystal architecture. To our knowledge, this is the first example of a macrocyclic ligand forming a BaII-based one-dimensional coordination polymer, containing CoIIions surrounded by a N4O2donor set.

Cadmium Carboxylate Chemistry: Preparation, Crystal Structure, and Thermal and Spectroscopic Characterization of the One-dimensional Polymer [Cd(O2CMe)(O2CPh)(H2O)2]n

2003 ◽  
Vol 58 (11) ◽  
pp. 1045-1054 ◽  
Author(s):  
Theocharis C. Stamatatos ◽  
Eugenia Katsoulakoua ◽  
Vassilios Nastopoulos ◽  
Catherine P. Raptopoulou ◽  
Evy Manessi-Zoupa ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Spectroscopic Characterization ◽  
One Dimensional ◽  
X Ray Crystallography ◽  
Anhydrous Compound ◽  
Trigonal Prismatic Coordination ◽  
The One ◽  
Trigonal Prismatic ◽  
Preparative Route

Compound [Cd(O2CMe)(O2CPh)(H2O)2]n (1) was initially obtained in a serendipitous way during efforts to prepare a CdII /PhCO2 −/bepy complex (bepy = 2-benzoylpyridine). With the identity of 1 established by single-crystal X-ray crystallography, a rational preparative route to this complex was designed and carried out by reacting Cd(O2CMe)2·2H2O with a slight excess of PhCOOH in MeCN under reflux. The crystal structure of 1 consists of isolated zig-zag chains. The CdII atom is coordinated to five carboxylate and two aqua oxygen atoms creating a distorted, capped trigonal prismatic coordination polyhedron. The acetate group exhibits the η1:η2:μ2 coordination mode, while the benzoate ligand is chelating. There is an extensive hydrogen-bonding network which reinforces the chains and also links them generating sheets. The new complex was characterized by IR, far-IR, Raman, CP MAS and solution 113Cd NMR spectroscopy. The spectroscopic data are discussed in terms of the nature of bonding and the known structure. An anhydrous compound with the empirical formula Cd(O2CMe)(O2CPh) was isolated during the thermal decomposition of 1; the vibrational study of this thermally stable intermediate supports an 1D polymeric structure with 6-coordinate CdII ions.

Sr3PbNiO6:  Trigonal Prismatic Lead in a Novel Inverse K4CdCl6-type Pseudo-One-Dimensional Oxide

1999 ◽  
Vol 11 (10) ◽  
pp. 2984-2988 ◽  
Author(s):  
Mark D. Smith ◽  
Judith K. Stalick ◽  
Hans-Conrad zur Loye
Keyword(s):  
One Dimensional ◽  
Trigonal Prismatic

Bis(1H-benzimidazole-κN 3)bis(naphthalene-2-acetato-κ2 O,O′)cadmium(II) monohydrate

2007 ◽  
Vol 63 (3) ◽  
pp. m692-m694 ◽  
Author(s):  
Ji-Guo Duan ◽  
Ji-Wei Liu ◽  
Song Wu
Keyword(s):  
Crystal Structure ◽  
Rotation Axis ◽  
Chain Structure ◽  
Mononuclear Complex ◽  
Stacking Interactions ◽  
Dimensional Chain ◽  
One Dimensional ◽  
Solvent Water ◽  
Trigonal Prismatic Coordination ◽  
Trigonal Prismatic

The CdII ion of the title mononuclear complex, [Cd(C12H9O2)2(C7H6N2)2]·H2O, lies on a crystallographic twofold rotation axis and is in a distorted trigonal prismatic coordination enivironment, involving four carboxylate O atoms from two chelating naphthaleneacetate ligands and two N atoms from two benzimidazole ligands. In the crystal structure, intermolecular N—H...O hydrogen bonds and π–π stacking interactions give rise to a one-dimensional chain structure. The solvent water molecule also lies on a crystallographic twofold rotation axis.

scholarly journals Crystallographic Aspects of the CDW Instabilities in NbSe3

2014 ◽  
Vol 70 (a1) ◽  
pp. C1608-C1608
Author(s):  
Albert Prodan ◽  
Herman Van Midden ◽  
Erik Zupanič ◽  
Rok Žitko ◽  
Joachim Kusz ◽  
...  
Keyword(s):  
Alternative Model ◽  
Charge Density Waves ◽  
Atomic Scale ◽  
Scanning Tunneling ◽  
Tunneling Microscopy ◽  
One Dimensional ◽  
Domain Structures ◽  
Modulated Structures ◽  
Stm Images ◽  
Trigonal Prismatic

Charge-density waves (CDW) in some quasi one-dimensional compounds can be depinned from the lattice by an external electric field. In the case of NbSe3, two CDW transitions have been reported with onset temperatures of 144 K and 59 K. From an analysis of the published low-temperature (LT) scanning tunneling microscopy (STM) images, which inherently allow the resolution of domain structures on the atomic scale, an alternative model of the CDW modulated structures in NbSe3 is proposed. In contrast to the existing model, where two incommensurate (IC) modes, q1 = (0,0.241,0) and q2 = (0.5,0.260,0.5) are selectively confined to two of three available structurally distinguished types of bi-capped trigonal prismatic columns, the alternative model [1,2] proceeds from the assumption that both columns of the same pair are alternatively modulated by the two modes, whose IC components add within experimental error into a commensurate value. The observed domains are formed as a result of the different bonding within and between the structural layers, separated by Van der Waals gaps, and of the ability of the two modes to be easily interchanged between two symmetry-related columns of the same type. This assumption is in accord with the published LT STM results, which confirm i.a. the presence of both IC modes above 59 K, where according to the previous model only the q1 contribution should be expected. A pair of two alternatively modulated columns of the same type represents the basic structural unit of the CDW ground state. The two modes can formally be replaced by a single inharmonic modulation, obtained by "beating" between the two IC modes.

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