A nickel(ii)–manganese(ii)-azido layered coordination polymer showing a three-dimensional ferrimagnetic order at 35 K

2018 ◽  
Vol 47 (3) ◽  
pp. 836-844 ◽  
Author(s):  
Sagar Ghosh ◽  
Shuvayan Roy ◽  
Cai-Ming Liu ◽  
Sasankasekhar Mohanta
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Coordination Polymer ◽  
Hysteresis Loop ◽  
Long Range ◽  
Three Dimensional ◽  
Molecular Magnet ◽  
Two Dimensional ◽  
Ferrimagnetic Ordering

The synthesis, crystal structure and magnetic properties of a two-dimensional nickel(ii)–manganese(ii)–azido system are described. It is an interesting molecular magnet because it exhibits long-range ferrimagnetic ordering at a Tc of 35 K and a hysteresis loop up to 20 K.

scholarly journals Crystal structure of poly[μ2-aqua-aqua(μ2-4-nitro-2,5,6-trioxo-1,2,5,6-tetrahydropyridin-3-olato)hemi-μ4-oxalato-barium(II)]

2015 ◽  
Vol 71 (5) ◽  
pp. 459-462 ◽  
Author(s):  
Rusul Alabada ◽  
Olga Kovalchukova ◽  
Irina Polyakova ◽  
Svetlana Strashnova ◽  
Vladimir Sergienko
Keyword(s):  
Crystal Structure ◽  
Coordination Polymer ◽  
Hydrogen Bonds ◽  
Three Dimensional ◽  
Water Molecules ◽  
Two Dimensional ◽  
Supramolecular Framework ◽  
Screw Axis ◽  
Bond Lengths ◽  
Chelate Rings

In the title coordination polymer, [Ba(C5HN2O6)(C2O4)0.5(H2O)2]n, the tenfold coordination of the Ba centre consists of four O atoms from the two 4-nitro-2,5,6-trioxo-1,2,5,6-tetrahydropyridin-3-olate (L) anions, three O atoms of two oxalate anions and three water molecules. The Ba—O bond lengths fall in the range 2.698 (3)–2.978 (3) Å. TheLligand chelates two Ba atoms related by a screw axis, leading to formation of fused five- and six-membered chelate rings. Due to the bridging function of the ligands and water molecules, the complex monomers are connected into polymeric two-dimensional layers parallel to thebcplane. Intermolecular O—H...O hydrogen bonds link these layers into a three-dimensional supramolecular framework.

scholarly journals Crystal structure of a CuIIcomplex with a bridging ligand: poly[[pentakis[μ2-1,1′-(butane-1,4-diyl)bis(1H-imidazole)-κ2N3:N3′]dicopper(II)] tetranitrate tetrahydrate]

2014 ◽  
Vol 70 (12) ◽  
pp. 503-506
Author(s):  
Fayuan Wu ◽  
Mengxiang Shang ◽  
Shihua Li ◽  
Yu Zhao
Keyword(s):  
Crystal Structure ◽  
Coordination Polymer ◽  
Three Dimensional ◽  
Inversion Symmetry ◽  
Two Dimensional ◽  
Hydrothermal Conditions ◽  
Bridging Ligand ◽  
Pyramidal Geometry ◽  
Square Pyramidal Geometry ◽  
Entangled Framework

A novel two-dimensional→three-dimensional CuIIcoordination polymer, {[Cu2(C10H14N4)5](NO3)4·4H2O}n, based on the 1,1′-(butane-1,4-diyl)bis(1H-imidazole) (biim) ligand and containing one crystallographically unique CuIIatom, has been synthesized under hydrothermal conditions. The CuIIatom is coordinated by five N atoms from biim ligands, one of which has crystallographically imposed inversion symmetry, giving rise to a slightly distorted CuN5square-pyramidal geometry. The CuIIcations are linked by biim ligands to give a 44layer; the layers are further bridged by biim ligands, generating a double sheet with a thickness of 14.61 Å. The sheet features rhombic Cu4(biim)4windows built up from four CuIIcenters and four biim ligands with dimensions of 14.11 × 14.07 Å2. Each window of a layer is penetrated directly by the biim ligand of the adjacent net, giving a two-dimensional→three-dimensional entangled framework.

scholarly journals Crystal structure of the two-dimensional coordination polymer poly[di-μ-bromido-bis(μ-tetrahydrothiophene)dicopper(I)]

2021 ◽  
Vol 77 (7) ◽  
pp. 744-748
Author(s):  
Michael Knorr ◽  
Lydie Viau ◽  
Yoann Rousselin ◽  
Marek M. Kubicki
Keyword(s):  
Crystal Structure ◽  
Coordination Polymer ◽  
Hydrogen Bonds ◽  
Three Dimensional ◽  
Supramolecular Network ◽  
Two Dimensional ◽  
Different Types ◽  
Secondary Building Units ◽  
Mecn Solution ◽  
Bonding Mode

The polymeric title compound, [Cu2Br2(C4H8S)2] n , CP1, represents an example of a two-dimensional coordination polymer resulting from reaction of CuBr with tetrahydrothiophene (THT) in MeCN solution. The two-dimensional layers consist of two different types of rhomboid-shaped dinuclear Cu(μ2-Br)2Cu secondary building units (SBUs); one with a quite loose Cu...Cu separation of 3.3348 (10) Å and a second one with a much closer intermetallic contact of 2.9044 (9) Å. These SBUs are interconnected through bridging THT ligands, in which the S atom acts as a four-electron donor bridging each Cu(μ2-Br)2Cu unit in a μ2-bonding mode. In the crystal, the layers are linked by very weak C—H...·Br hydrogen bonds with H...Br distances of 2.95 Å, thus giving rise to a three-dimensional supramolecular network.

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