Structural and Magnetic Properties of the Coordination Polymer Mn(dca)2(H2O)2·2Me4pyz, dca = Dicyanamide (N(CN)2-), Me4pyz = Tetramethylpyrazine

2002 ◽  
Vol 55 (5) ◽  
pp. 311 ◽  
Author(s):  
A. M. Kutasi ◽  
A. R. Harris ◽  
S. R. Batten ◽  
B. Moubaraki ◽  
K. S. Murray
Keyword(s):  
Hydrogen Bond ◽  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Coordination Polymer ◽  
Polymer Chains ◽  
Antiferromagnetic Coupling ◽  
One Dimensional ◽  
Polymeric Chains ◽  
Structural And Magnetic Properties ◽  
Water Ligands

The structure of Mn(dca)2(H2O)2�2Me4pyz (dca = dicyanamide, N(CN)2-; Me4pyz = tetramethylpyrazine) contains one-dimensional polymeric chains of Mn(dca)2(H2O)2. The Me4pyz molecules hydrogen-bond to the water ligands, and form ���Me4pyz���H2O���Me4pyz���H2O��� chains which flank either side of the coordination polymer chains. Magnetic susceptibility studies show that very weak intra-chain antiferromagnetic-coupling occurs.

scholarly journals The first coordination compound of 6-fluoronicotinate: the crystal structure of a one-dimensional nickel(II) coordination polymer containing the mixed ligands 6-fluoronicotinate and 4,4′-bipyridine

2020 ◽  
Vol 76 (4) ◽  
pp. 500-505 ◽  
Author(s):  
Nives Politeo ◽  
Mateja Pisačić ◽  
Marijana Đaković ◽  
Vesna Sokol ◽  
Boris-Marko Kukovec
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bond ◽  
Coordination Polymer ◽  
Three Dimensional ◽  
Water Molecules ◽  
Sulfate Heptahydrate ◽  
One Dimensional ◽  
Lattice Water ◽  
Mixed Ligands ◽  
Polymeric Chains

A one-dimensional nickel(II) coordination polymer with the mixed ligands 6-fluoronicotinate (6-Fnic) and 4,4′-bipyridine (4,4′-bpy), namely, catena-poly[[diaquabis(6-fluoropyridine-3-carboxylato-κO)nickel(II)]-μ-4,4′-bipyridine-κ2 N:N′] trihydrate], {[Ni(6-Fnic)2(4,4′-bpy)(H2O)2]·3H2O} n , (1), was prepared by the reaction of nickel(II) sulfate heptahydrate, 6-fluoronicotinic acid (C6H4FNO2) and 4,4′-bipyridine (C10H8N2) in a mixture of water and ethanol. The nickel(II) ion in 1 is octahedrally coordinated by the O atoms of two water molecules, two O atoms from O-monodentate 6-fluoronicotinate ligands and two N atoms from bridging 4,4′-bipyridine ligands, forming a trans isomer. The bridging 4,4′-bipyridine ligands connect symmetry-related nickel(II) ions into infinite one-dimensional polymeric chains running in the [1\overline{1}0] direction. In the extended structure of 1, the polymeric chains and lattice water molecules are connected into a three-dimensional hydrogen-bonded network via strong O—H...O and O—H...N hydrogen bonds, leading to the formation of distinct hydrogen-bond ring motifs: octameric R 8 8(24) and hexameric R 8 6(16) loops.

Hydrothermal synthesis, structure and magnetic properties of a three-dimensional cobalt(ii) – aminophenyltetrazolate coordination polymer

2014 ◽  
Vol 43 (19) ◽  
pp. 7263-7268 ◽  
Author(s):  
Tiffany M. Smith ◽  
Michael Tichenor ◽  
Yuan-Zhu Zhang ◽  
Kim R. Dunbar ◽  
Jon Zubieta
Keyword(s):  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Hydrothermal Synthesis ◽  
Coordination Polymer ◽  
Three Dimensional ◽  
Magnetic Behavior ◽  
Ac Magnetic Susceptibility

The three-dimensional [Co3(OH)2(H2O)2(aptet)4] exhibits magnetic properties consistent with a ferrimagnetic chain with the non-compensating resultant moment of one Co(ii) per trinuclear Co(ii) subunit and ac magnetic susceptibility indicative of glassy-like magnetic behavior.

Magnetic properties of manganese based one-dimensional spin chains

2015 ◽  
Vol 44 (46) ◽  
pp. 19812-19819 ◽  
Author(s):  
K. S. Asha ◽  
K. M. Ranjith ◽  
Arvind Yogi ◽  
R. Nath ◽  
Sukhendu Mandal
Keyword(s):  
Heat Capacity ◽  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Spin Chains ◽  
One Dimensional

Magnetic susceptibility and heat capacity of three manganese based structures are measured and modeled with one-dimensional antiferromagnetic chains.

Syntheses and crystal structures of two magnesium–tetrazole compounds in salt and polymeric forms

2015 ◽  
Vol 71 (3) ◽  
pp. 222-228 ◽  
Author(s):  
Mohamed Abdellatif Bensegueni ◽  
Aouatef Cherouana ◽  
Slimane Dahaoui
Keyword(s):  
Alkaline Earth ◽  
Three Dimensional ◽  
Polymer Chains ◽  
Magnesium Ion ◽  
Water Molecules ◽  
Compound I ◽  
Hydrothermal Conditions ◽  
One Dimensional ◽  
Polymeric Chains ◽  
Hydrogen Bonded

Two alkaline earth–tetrazole compounds, namelycatena-poly[[[triaquamagnesium(II)]-μ-5,5′-(azanediyl)ditetrazolato-κ3N1,N1′:N5] hemi{bis[μ-5,5′-(azanediyl)ditetrazolato-κ3N1,N1′:N2]bis[triaquamagnesium(II)]} monohydrate], {[Mg(C2HN9)(H2O)3][Mg2(C2HN9)2(H2O)6]0.5·H2O}n, (I), and bis[5-(pyrazin-2-yl)tetrazolate] hexaaquamagnesium(II), (C5H3N6)[Mg(H2O)6], (II), have been prepared under hydrothermal conditions. Compound (I) is a mixed dimer–polymer based on magnesium ion centres and can be regarded as the first example of a magnesium–tetrazolate polymer in the crystalline form. The structure shows a complex three-dimensional hydrogen-bonded network that involves magnesium–tetrazolate dimers, solvent water molecules and one-dimensional magnesium–tetrazolate polymeric chains. The intrinsic cohesion in the polymer chains is ensured by N—H...N hydrogen bonds, which formR22(7) rings, thus reinforcing the propagation of the polymer chain along theaaxis. The crystal structure of magnesium tetrazole salt (II) reveals a mixed ribbon of hydrogen-bonded rings, of typesR22(7),R22(9) andR24(10), running along thecaxis, which are linked byR24(16) rings, generating a 4,8-cflunet.

scholarly journals Synthesis and crystal structure of a 6-chloronicotinate salt of a one-dimensional cationic nickel(II) coordination polymer with 4,4′-bipyridine

2020 ◽  
Vol 76 (5) ◽  
pp. 599-604
Author(s):  
Nives Politeo ◽  
Mateja Pisačić ◽  
Marijana Đaković ◽  
Vesna Sokol ◽  
Boris-Marko Kukovec
Keyword(s):  
Molecular Structure ◽  
Coordination Polymer ◽  
Three Dimensional ◽  
Polymeric Chain ◽  
Water Molecules ◽  
Sulfate Heptahydrate ◽  
Synthesis And Crystal Structure ◽  
One Dimensional ◽  
Polymeric Chains ◽  
Hydrogen Bonded

A 6-chloronicotinate (6-Clnic) salt of a one-dimensional cationic nickel(II) coordination polymer with 4,4′-bipyridine (4,4′-bpy), namely, catena-poly[[[tetraaquanickel(II)]-μ-4,4′-bipyridine-κ2 N:N′] bis(6-chloronicotinate) tetrahydrate], {[Ni(C10H8N2)(H2O)4](C6H3ClNO2)2·4H2O} n or {[Ni(4,4′-bpy)(H2O)4](6-Clnic)2·4H2O} n , (1), was prepared by the reaction of nickel(II) sulfate heptahydrate, 6-chloronicotinic acid and 4,4′-bipyridine in a mixture of water and ethanol. The molecular structure of 1 comprises a one-dimensional polymeric {[Ni(4,4′-bpy)(H2O)4]2+} n cation, two 6-chloronicotinate anions and four water molecules of crystallization per repeating polymeric unit. The nickel(II) ion in the polymeric cation is octahedrally coordinated by four water molecule O atoms and by two 4,4′-bipyridine N atoms in the trans position. The 4,4′-bipyridine ligands act as bridges and, thus, connect the symmetry-related nickel(II) ions into an infinite one-dimensional polymeric chain extending along the b-axis direction. In the extended structure of 1, the polymeric chains of {[Ni(4,4′-bpy)(H2O)4]2+} n , the 6-chloronicotinate anions and the water molecules of crystallization are assembled into an infinite three-dimensional hydrogen-bonded network via strong O—H...O and O—H...N hydrogen bonds, leading to the formation of the representative hydrogen-bonded ring motifs: tetrameric R 2 4(8) and R 4 4(10) loops, a dimeric R 2 2(8) loop and a pentameric R 4 5(16) loop.

scholarly journals Slow Magnetic Relaxation in a One-Dimensional Coordination Polymer Constructed from Hepta-Coordinate Cobalt(II) Nodes

2020 ◽  
Vol 6 (4) ◽  
pp. 45
Author(s):  
Amit Kumar Mondal ◽  
Arpan Mondal ◽  
Sanjit Konar
Keyword(s):  
Magnetic Susceptibility ◽  
Coordination Polymer ◽  
Magnetic Anisotropy ◽  
Ab Initio Calculations ◽  
Direct Current ◽  
Magnetic Relaxation ◽  
Relaxation Processes ◽  
Ac Magnetic Susceptibility ◽  
One Dimensional ◽  
Slow Magnetic Relaxation

A one-dimensional coordination polymer was synthesized employing hepta-coordinate CoII as nodes and dicyanamide as linkers. Detailed direct current (DC) and alternating current (AC) magnetic susceptibility measurements reveal the presence of field-induced slow magnetic relaxation behavior of the magnetically isolated seven-coordinate CoII center with an easy-plane magnetic anisotropy. Detailed ab initio calculations were performed to understand the magnetic relaxation processes. To our knowledge, the reported complex represents the first example of slow magnetic relaxation in a one-dimensional coordination polymer constructed from hepta-coordinate CoII nodes and dicyanamide linkers.

Struktur und magnetische Eigenschaften von [CuII(2-thiooxamat)2] · 1,6H2O / Structure and Magnetic Properties of [CuII(2-thiooxamat)2] · 1,6 H2O

1990 ◽  
Vol 45 (7) ◽  
pp. 1000-1004 ◽  
Author(s):  
Ralf Krause ◽  
Rainer Mattes
Keyword(s):  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Antiferromagnetic Coupling ◽  
Crystal Data ◽  
Axial Coordination ◽  
Coordination Sites ◽  
Chelate Rings

The reaction of CuSO4·5 H2O with potassium 2-thiooxamate, K[NH2C(S)CO2], yields [Cu(2-thiooxamate)2]·1.6 H2O. Crystal data: a = 1501.6(8), b = 1650(1), c = 375.4(2) pm, β = 90.65(5)°, Ζ = 4. The structure was refined with 2213 reflections to R = 0.044. Copper(II) is chelated by two thiooxamate ligands, which act as O- and S-donors forming five-membered chelate rings. This cis-planar [Cu(2-thiooxamate)2] molecules are stacked. The axial coordination sites at copper(II) interact within the stacks with O- and S-donor atoms of neighbouring units. Above 60 K the magnetic susceptibility follows the Curie-Weiss law with antiferromagnetic coupling.

scholarly journals catena-Poly[[[4-amino-3,5-bis(pyridin-2-yl)-4H-1,2,4-triazole-κ2N1,N5](dicyanamido-κN)copper(II)]-μ2-dicyanamido-κ2N:N′]: coordination polymer chains linked into a bilayer by hydrogen bonds and π–π stacking interactions

2014 ◽  
Vol 70 (4) ◽  
pp. 359-363 ◽  
Author(s):  
Zouaoui Setifi ◽  
Fatima Setifi ◽  
Mohamed Saadi ◽  
Djamil-Azzeddine Rouag ◽  
Christopher Glidewell
Keyword(s):  
Coordination Polymer ◽  
Hydrogen Bonds ◽  
Polymer Chains ◽  
Stacking Interactions ◽  
Terminal Ligand ◽  
One Dimensional ◽  
Bridging Ligand ◽  
Pyramidal Geometry ◽  
Π Stacking ◽  
Square Pyramidal Geometry

In the title compound, [Cu(C2N3)2(C12H10N6)]nor [Cu(dca)2(abpt)]n, where abpt is 4-amino-3,5-bis(pyridin-2-yl)-4H-1,2,4-triazole and dca is the dicyanamide anion, the CuIIcentre is five-coordinate with an approximately square-pyramidal geometry. One of the two dicyanamide ligands is a terminal ligand, but the other one acts as a μ1,5-bridging ligand between pairs of CuIIcentres, so generating a one-dimensional coordination polymer. A combination of N—H...N and C—H...N hydrogen bonds, augmented by π–π stacking interactions, links the coordination polymer chains into a bilayer structure. Comparisons are made with some related CuIIcomplexes containing dca ligands and heteroaromatic co-ligands.

scholarly journals catena-Poly[[(dichloridozinc)-μ-4,4′-bis(1H-imidazol-1-yl)biphenyl-κ2N3:N3′] 0.25-hydrate]

2012 ◽  
Vol 68 (4) ◽  
pp. m406-m406
Author(s):  
Yong-Xia Ning ◽  
Wen Fan ◽  
Gang Xie
Keyword(s):  
Coordination Polymer ◽  
Water Molecule ◽  
Chloride Ions ◽  
Dihedral Angles ◽  
One Dimensional ◽  
Bridging Ligand ◽  
Polymeric Chains ◽  
Benzene Rings ◽  
Title One ◽  
Biphenyl Ligands

In the title one-dimensional coordination polymer, {[ZnCl2(C18H14N4)]·0.25H2O}n, the ZnIIatom is coordinated by two chloride ions and two 4,4′-bis(1H-imidazol-1-yl)biphenyl ligands, generating a distorted tetrahedral ZnCl2N2geometry. The dihedral angle between the benzene rings of the ligand is 51.0 (1)° and the dihedral angles between the benzene rings and their attached imidazole rings are 18.7 (2) and 45.9 (1)°. The bridging ligand leads to [10-1] polymeric chains in the crystal and the disordered water molecule (occupancy 0.25) forms O—H...Cl hydrogen bonds.

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