Synthesis, crystal structure and magnetic properties of one-dimensional coordination polymers

Polyhedron ◽  
2014 ◽  
Vol 81 ◽  
pp. 668-674 ◽  
Author(s):  
Q.R. Cheng ◽  
H. Zhou ◽  
Z.Q. Pan ◽  
G.Y. Liao ◽  
Z.G. Xu
2018 ◽  
Vol 4 (3) ◽  
pp. 38 ◽  
Author(s):  
Tamyris T. da Cunha ◽  
Willian X. C. Oliveira ◽  
Emerson F. Pedroso ◽  
Francesc Lloret ◽  
Miguel Julve ◽  
...  

The synthesis, crystal structure and magnetic properties of the coordination polymers of formula [EDAP{Li6(H2O)8[(Cu2(μ-mpba)2)2(H2O)2]}]n (1) and [(EDAP)2{K(H2O)4[Cu2(μ-mpba)2(H2O)2]}Cl·2H2O]n (2), in which mpba = N,N′-1,3-phenylenebis(oxamate) and EDAP2+ = 1,1′-ethylenebis(4-aminopyridinium) are described. Both compounds have in common the presence of the [Cu2(mpba)2]4− tetraanionic unit which is a [3,3] metallacyclophane motif in which the copper(II) ions are five-coordinate in a distorted square pyramidal surrounding. The complex anion in 1 is dimerized through double out-of-plane copper to outer carboxylate-oxygen atoms resulting in the centrosymmetric tetracopper(II) fragment [Cu4(μ-mpba)4(H2O)2]8− which act as a ligand toward six hydrated lithium(I) cations leading to anionic ladder-like double chains whose charge is neutralized by the EDAP2+ cations. In the case of 2, each dicopper(II) entity acts as a ligand towards tetraquapotassium(I) units to afford anionic zig zag single chains of formula {K(H2O)4[Cu2(μ-mpba)2(H2O)2]}n3n− plus EDAP2+ cations and non-coordinate chloride anions. Cryomagnetic measurements on polycrystalline samples 1 and 2 show the occurrence of ferromagnetic interactions between the copper(II) ions across the –Namidate–(C–C–C)phenyl–Namidate– exchange pathway [J = +10.6 (1) and +8.22 cm−1 (2)] and antiferromagnetic ones through the double out-of-plane carboxylate-oxygen atoms [j = −0.68 cm−1 (1), the spin Hamiltonian being defined as H = − J ( S C u 1 · S C u 2 + S C u 2 i · S C u 1 i ) − j ( S C u 2 · S C u 2 i ) ].


2012 ◽  
Vol 90 (4) ◽  
pp. 362-367
Author(s):  
Qianqian Bao ◽  
Yutao Ma ◽  
Qihua Zhao ◽  
Yanghui Luo ◽  
Baiwang Sun

The structures of two one-dimensional coordination complexes, [MII(3-Bzpy)2(N(CN)2)2] (M = Mn (1) and Co (2) and 3-Bzpy = 3-benzoylpyridine), have been determined in this work. The two structures are isomorphous, crystallize in a monoclinic P21/c space group, and show almost the same crystal structure. The magnetic measurements of the two compounds (2–300 K) indicate that antiferromagnetic exchanges exist between the metal ions of the two compounds.


2007 ◽  
Vol 360 (8) ◽  
pp. 2523-2531 ◽  
Author(s):  
Young Sin You ◽  
Jung Hee Yoon ◽  
Jeong Hak Lim ◽  
Hyoung Chan Kim ◽  
Chang Seop Hong

Physica B+C ◽  
1984 ◽  
Vol 125 (2) ◽  
pp. 135-149 ◽  
Author(s):  
R. Hoogerbeets ◽  
S.A.J. Wiegers ◽  
A.J. Van Duyneveldt ◽  
R.D. Willett ◽  
U. Geiser

Polyhedron ◽  
2017 ◽  
Vol 138 ◽  
pp. 177-184 ◽  
Author(s):  
Febee R. Louka ◽  
Salah S. Massoud ◽  
Tamim K. Haq ◽  
Masayuki Koikawa ◽  
Masahiro Mikuriya ◽  
...  

2007 ◽  
Vol 180 (10) ◽  
pp. 2973-2977 ◽  
Author(s):  
Wei Li ◽  
Zongwei Li ◽  
Licun Li ◽  
Daizheng Liao ◽  
Zonghui Jiang

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