Crystal structure of the coordination polymer [Co(bipy)1.5(NO3)2]·CS2 (bipy=4,4′-bipyridine), a new motif for a network sustained by ‘T-shape’ building blocks

1998 ◽  
Vol 22 (2) ◽  
pp. 177-181 ◽  
Author(s):  
K. Nicole Power ◽  
Tracy L. Hennigar ◽  
Michael J. Zaworotko
Keyword(s):  
Crystal Structure ◽  
Coordination Polymer ◽  
Building Blocks

Synthesis and crystal structure of a two-dimensional sodium coordination polymer of 4,4′-(diazenediyl)bis(1H-1,2,4-triazol-5-one)

2016 ◽  
Vol 72 (2) ◽  
pp. 166-169 ◽  
Author(s):  
Jiajia Guo ◽  
Wenli Cao ◽  
Shuailei Li ◽  
Kanghua Miao ◽  
Jirong Song ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Coordination Polymer ◽  
Crystal Engineering ◽  
Aqueous Media ◽  
Building Blocks ◽  
Two Dimensional ◽  
Bridging Ligands ◽  
Synthesis And Crystal Structure ◽  
Water Ligands ◽  
Selection Of

The crystal engineering of coordination polymers has aroused interest due to their structural versatility, unique properties and applications in different areas of science. The selection of appropriate ligands as building blocks is critical in order to afford a range of topologies. Alkali metal cations are known for their mainly ionic chemistry in aqueous media. Their coordination number varies depending on the size of the binding partners, and on the electrostatic interaction between the ligands and the metal ions. The two-dimensional coordination polymer poly[tetra-μ-aqua-[μ4-4,4′-(diazenediyl)bis(5-oxo-1H-1,2,4-triazolido)]disodium(I)], [Na2(C4H2N8O2)(H2O)4]n, (I), was synthesized from 4-amino-1H-1,2,4-triazol-5(4H)-one (ATO) and its single-crystal structure determined. The mid-point of the imino N=N bond of the 4,4′-(diazenediyl)bis(5-oxo-1H-1,2,4-triazolide) (ZTO2−) ligand is located on an inversion centre. The asymmetric unit consists of one Na+cation, half a bridging ZTO2−ligand and two bridging water ligands. Each Na+cation is coordinated in a trigonal antiprismatic fashion by six O atoms,i.e.two from two ZTO2−ligands and the remaining four from bridging water ligands. The Na+cation is located near a glide plane, thus the two bridging O atoms from the two coordinating ZTO2−ligands are on adjacent apices of the trigonal antiprism, rather than being in ananticonfiguration. All water and ZTO2−ligands act as bridging ligands between metal centres. Each Na+metal centre is bridged to a neigbouring Na+cation by two water molecules to give a one-dimensional [Na(H2O)2]nchain. The organic ZTO2−ligand, an O atom of which also bridges the same pair of Na+cations, then crosslinks these [Na(H2O)2]nchains to form two-dimensional sheets. The two-dimensional sheets are further connected by intermolecular hydrogen bonds, giving rise to a stabile hydrogen-bonded network.

A Novel Coordination Polymer Based on Trinuclear Cobalt Building Blocks Cluster: Synthesis, Crystal Structure, and Properties

2017 ◽  
Vol 62 (7) ◽  
pp. 1041-1045
Author(s):  
J. F. Lu ◽  
Z. H. Tang ◽  
J. Shi ◽  
H. G. Ge ◽  
M. Jiang ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Coordination Polymer ◽  
Building Blocks ◽  
Structure And Properties

Synthesis, Thermal Properties and Crystal Structure of Twinned Crystals of the New Coordination Polymer Poly[(CuBr)2(μ2-pyrimidine-N,N’)]

2003 ◽  
Vol 58 (11) ◽  
pp. 1105-1111 ◽  
Author(s):  
Christian Näther ◽  
Inke Jeß ◽  
Michael Bolte
Keyword(s):  
Crystal Structure ◽  
Coordination Polymer ◽  
Bromine Atom ◽  
Exothermic Reaction ◽  
Building Blocks ◽  
Single Step ◽  
Donor Ligands ◽  
Structure Model ◽  
Twin Domain ◽  
Second Twin

Abstract Reaction of copper(I) bromide with pyrimidine in acetonitrile leads to the formation of crystals of the new coordination polymer poly[(CuBr)2(μ2-pyrimidine-N,N’)]. Indexing of the reflections yields a monoclinic primitive cell with a = 3.9119(2), b = 13.525(1), c = 15.346(1)Å , β = 97.29(1)° and V =805.4(1) Å3. Inspection of the reciprocal space shows weak reflections which might be indicative of a superstructure leading to a doubling of the crystallographic c-axis. The structure can be solved in space group P21/m but the refinement leads to very poor reliability factors (wR2 for all refl.: 62.57%, R1 for all Fo > 4σ (Fo) = 27.84%). A twin refinement assuming merohedral twinning drastically reduces the R-values (wR2 for all refl.: 7.27%, R1 for all Fo > 4σ (Fo) = 2.64%) and a structure model is obtained which consists of two crystallographically independent copper and bromine atoms and two pyrimidine ligands in the asymmetric unit. However, carefull inspection of this structure shows that the two crystallographically independent layers formed by the connection of the building blocks are very similar and that they are related by a translation by half of the crystallographic c-axis. As a result of that, the crystal is just a partial merohedral twin and the reflections which led to the assumption that the c-axis is twice as long are generated by the second twin domain. The structure was refined with the correct twin law (wR2 for all refl.: 6.70%, R1 for all Fo > 4σ (Fo) = 2.57%). By this procedure a reasonable structure model is obtained which consists of one crystallographically independent copper and bromine atom and one pyrimidine ligand. In the crystal structure CuBr double chains are formed which are connected into layers via μ-N,N’ coordination by the N-donor ligands. On heating, the compound loses all of the ligands and transforms into CuBr within only one single step in an exothermic reaction.

scholarly journals Coordination of a neutral thiazyl radical to Co(II) tetraphenylporphyrin

2014 ◽  
Vol 70 (a1) ◽  
pp. C1241-C1241
Author(s):  
Delia Haynes ◽  
Orde Munro ◽  
Laura van Laeren ◽  
Katherine de Villiers
Keyword(s):  
Crystal Structure ◽  
Complex Formation ◽  
Coordination Polymer ◽  
Sulfur Atom ◽  
Coordination Mode ◽  
Magnetic Coupling ◽  
Building Blocks ◽  
Metal Centre ◽  
Radical Ligand ◽  
Ligand Bond

The 1,2,3,5-dithiadiazolyl radicals (R-CNSSN) are of considerable interest due to their potential as building blocks for materials with interesting magnetic or conducting properties. The behaviour of these neutral radicals as ligands has also been investigated [1]. Reactions with Pt(0) and Pd(0) have been shown to yield complexes where coordination to the metal is through sulfur, and the S-S bond in the radical is broken [2]. More recent work has shown that coordination through the radical nitrogen is possible with 2'-pyridyl-substituted dithiadiazolyl in combination with strongly electron-withdrawing ligands. Several of these complexes show magnetic coupling between the radical and the metal centre [3]. We have recently begun investigating the coordination of dithiadiazolyls to metalloporphyrins. The crystal structure of a coordination polymer formed between 4-(4'-pyridyl)-1,2,3,5-dithiadiazolyl and cobalt(II) tetraphenylporphyrin has been determined. The radical in this complex is coordinated through one sulfur atom, a coordination mode for dithiadiazolyls that has not previously been observed. Formation of the complex in solution has been investigated using EPR and UV-vis. Irradiation of a solution of the diamagnetic complex with intense white light leads to homolysis of the radical-ligand bond, observed by EPR. Our investigations of complex formation involving other dithiadiazolyl derivatives with a series of metalloporphyrins will also be presented.

Crystal Structure of the 2D Dimensional Coordination Polymer {[Cu(dps)2(DMSO)2](ClO4)2}n Based on 4,4/ -Dipyridyl Sulfide

2018 ◽  
Vol 483 (6) ◽  
pp. 631-635
Author(s):  
Yu. Tupolova ◽  
◽  
I. Shcherbakov ◽  
L. Popov ◽  
V. Tkachev ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Coordination Polymer

A 2-D Zn(II) coordination polymer based on 4,5-imidazoledicarboxylate and bis(benzimidazole) ligands: synthesis, crystal structure and fluorescence properties

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Xinzhao Xia ◽  
Lixian Xia ◽  
Geng Zhang ◽  
Yuxuan Jiang ◽  
Fugang Sun ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Coordination Polymer ◽  
Zigzag Chain ◽  
Supramolecular Framework ◽  
X Ray Diffraction ◽  
Hydrothermal Conditions ◽  
Hydrogen Bond Interaction ◽  
X Ray ◽  
New Type ◽  
Solid State Fluorescence

Abstract In this work, a new type of zinc(II) coordination polymer {[Zn(HIDC)(BBM)0.5]·H2O} n (Zn-CP) was synthesized using 4,5-imidazoledicarboxylic acid (H3IDC) and 2,2-(1,4-butanediyl)bis-1,3-benzimidazole (BBM) under hydrothermal conditions. Its structure has been characterized by infrared spectroscopy, elemental analysis and single crystal X-ray diffraction analysis. The Zn(II) ion is linked by the HIDC2− ligand to form a zigzag chain by chelating and bridging, and then linked by BBM to form a layered network structure. Adjacent layers are further connected by hydrogen bond interaction to form a 3-D supramolecular framework. The solid-state fluorescence performance of Zn-CP shows that compared with free H3IDC ligand, its fluorescence intensity is significantly enhanced.

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