Crystal structure, magnetic susceptibility, and EPR study of bis-(β-alaninium) tetrachlorocuprate(II): Spin-diffusion effects in a two-dimensional square planar ferromagnet with anisotropic and antisymmetric exchange

1981 ◽  
Vol 24 (9) ◽  
pp. 5372-5381 ◽  
Author(s):  
Roger D. Willett ◽  
Fred H. Jardine ◽  
Ivan Rouse ◽  
Raymond J. Wong ◽  
Christopher P. Landee ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Magnetic Susceptibility ◽  
Spin Diffusion ◽  
Two Dimensional ◽  
Square Planar ◽  
Diffusion Effects

scholarly journals Crystal structure and thermal properties of a square-planar NiIIcomplex of cyanide and a tricyclic bis-amidine ligand formedin situunder solvothermal conditions

2013 ◽  
Vol 69 (6) ◽  
pp. 565-568 ◽  
Author(s):  
Monika Stolárová ◽  
Juraj Černák ◽  
Milagros Tomás ◽  
Larry R. Falvello
Keyword(s):  
Crystal Structure ◽  
Thermal Properties ◽  
Complex I ◽  
Structural Unit ◽  
Planar Geometry ◽  
Water Molecules ◽  
Two Dimensional ◽  
Square Planar ◽  
Cyanide Ligands ◽  
Solvothermal Conditions

The reaction ofN1,N1′-(ethane-1,2-diyl)bis(propane-1,3-diamine) (bapen), K2[Ni(CN)4]·H2O and dimethylformamide in the presence of Gd(NO3)3·6H2O under solvothermal conditions yielded yellow crystals of dicyanido(2,3,4,6,7,9,10,11-octahydropyrimido[2′,1′:3,4]pyrazino[1,2-a]pyrimidine)nickel(II) hemihydrate, [Ni(CN)2(C10H16N4)]·0.5H2O, (I), the crystal structure of which is composed of [Ni(CN)2(pdpm)] molecules (pdpm is 2,3,4,6,7,9,10,11-octahydropyrimido[2′,1′:3,4]pyrazino[1,2-a]pyrimidine) on general positions linked by O—H...N hydrogen bonds to water molecules located on twofold axes. This structural unit is further linked by nonclassical C—H...N interactions to form a warped two-dimensional net perpendicular to the unit-cellbaxis. The nets are stacked, with C—H...O contacts joining successive units. The NiIIcation is coordinated with square-planar geometry by a chelating pdpm ligand and two cyanide ligands in mutuallycispositions. Complex (I) is stable up to 360 K, at which point dehydration takes place; the ligands start to decompose at 558 K.

Magnetic Properties and Crystal Structure of a 3,5-Dimethylpyrazolate-Bridged Binuclear Copper(II) Complex

2001 ◽  
Vol 56 (10) ◽  
pp. 970-974 ◽  
Author(s):  
Y. Elerman ◽  
A. Elmali
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Dihedral Angle ◽  
Coordination Sphere ◽  
Magnetic Moment ◽  
Binuclear Copper ◽  
Temperature Dependent ◽  
Orthorhombic Space Group ◽  
Square Planar

[Cu2L(prz)] (prz = 3,5-dimethylpyrazole and L = 1,3-bis(5-bromo-2-hydroxybenzylidene)- propan-2-ol) was synthesized and its crystal structure determined. It crystallizes in the orthorhombic space group Pbca with a = 14.160(9), b = 15.109(4), c = 21.298(5) Å, V = 4557(1) A3, Z = 8 . Two copper(II) ions are in a square-planar coordination. The metal coordination sphere is four-coordinate, with a planar N2O2 donor set. The dihedral angle between the two coordination planes is 12.14(7)°. The copper(II) centers are separated by 3.365(1) Å and antiferromagnetically coupled (J = -214.3 cm-1), which follows from temperature-dependent magnetic susceptibility measurements in the temperature range 4.6 to 310 K. The Cu-O-Cu angle is 125.9(1)° in the super-exchange pathway. The magnetic moment at 310 K is ca. 1.76 B.M. and 0.13 B.M. at 4.6 K.

scholarly journals Crystal structure of poly[[diaquatetra-μ2-cyanido-iron(II)platinum(II)] acetone disolvate]

2019 ◽  
Vol 75 (10) ◽  
pp. 1536-1539
Author(s):  
Iryna S. Kuzevanova ◽  
Dina D. Naumova ◽  
Kateryna V. Terebilenko ◽  
Sergiu Shova ◽  
Il'ya A. Gural'skiy
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Water Molecules ◽  
Two Dimensional ◽  
Polymeric Complex ◽  
Guest Molecules ◽  
Coordination Environment ◽  
Square Planar ◽  
Coordinated Water

In the title polymeric complex, {[FePt(CN)4(H2O)2]·2C3H6O} n , the FeII cation has an octahedral [FeN4O2] geometry being coordinated by two water molecules and four cyanide anions. The Pt cation is located on an inversion centre and has a square-planar coordination environment formed by four cyanide groups. The tetracyanoplatinate anions bridge the FeII cations to form infinite two-dimensional layers that propagate in the bc plane. Two guest molecules of acetone per FeII are located between the layers. These guest acetone molecules interact with the coordinated water molecules by O—H...O hydrogen bonds.

scholarly journals The crystal structure of ((cyclohexylamino){(Z)-2-[(E)-5-methoxy-3-nitro-2-oxidobenzylidene-κO]hydrazin-1-ylidene-κN 2}methanethiolato-κS)(dimethyl sulfoxide-κS)platinum(II): a supramolecular two-dimensional network

2019 ◽  
Vol 75 (10) ◽  
pp. 1486-1489
Author(s):  
Md. Azharul Arafath ◽  
Huey Chong Kwong ◽  
Farook Adam
Keyword(s):  
Crystal Structure ◽  
Dimethyl Sulfoxide ◽  
Chelate Ring ◽  
Title Complex ◽  
Planar Geometry ◽  
Maximum Deviation ◽  
Two Dimensional ◽  
Bite Angle ◽  
Dimensional Network ◽  
Square Planar

The PtII atom in the title complex, [Pt(C15H18N4O4S)(C2H6OS)], exists within a square-planar NS2O donor set provided by the N, S, O atoms of the di-anionic tridentate thiosemicarbazo ligand and a dimethyl sulfoxide S atom. The two chelate rings are coplanar, subtending a dihedral angle of 1.51 (7)°. The maximum deviation from an ideal square-planar geometry is seen in the five-membered chelate ring with an S—Pt—S bite angle of 96.45 (2)°. In the crystal, molecules are linked via N—H...O, C—H...O, C—H...N and C—H...π interactions into two-dimensional networks lying parallel to the ab plane. The conformations of related cyclohexylhydrazine-1-carbothioamide ligands are compared to that of the title compound.

Crystal Structure and Magnetic Properties of a Binuclear Copper(II) Complex Bridged by an Alkoxo-oxygen Atom and an Acetate Ion

2000 ◽  
Vol 55 (11) ◽  
pp. 1067-1073 ◽  
Author(s):  
C. T. Zeyrek ◽  
A. Elmali ◽  
I. Svoboda ◽  
H. Fuess
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Planar Geometry ◽  
Monoclinic Space Group ◽  
Ferromagnetic Coupling ◽  
Binuclear Copper ◽  
Temperature Dependent ◽  
Square Planar ◽  
Fitting Parameters

[Cu4(L)2(O2CMe)2] H2O (L = 1,3-bis(5-bromo-2-hydroxybenzylidene)propan-2-ol) was synthesized and its crystal structure determined. (C38H34N4O10Br4Cu4)·H2O, monoclinic, space group P21/c, a = 21.072(5), b = 9.673(2), c = 21.934(4) Å, β = 109.73(2)°, V = 4208(2) Å3, Z = 4. The crystal structure consists of two independent binuclear copper(II) complexes and the non-coordinating water molecule in the asymetric unit. The Cu(II) ions are in a square-planar geometry and coordinated by donor atoms of the ligand (NO3).The average Cu···Cu distance and average Cu-O-Cu angle are 3.491(2) Å and 132.0(1)°, respectively. Temperature-dependent magnetic susceptibility measurements of the complex show an intramolecular anti ferromagnetic coupling in the dimeric Cu(II) core. The fitting parameters are -2J = 174.4 cm-1, g = 1.98.

Crystal Structure and Magnetic Properties of a (μ-Hydroxo)(μ-acetato) Dicopper(II) Complex

2000 ◽  
Vol 55 (7) ◽  
pp. 561-566 ◽  
Author(s):  
E. Kavlakoglu ◽  
A. Elmali ◽  
Y. Elerman ◽  
H. Fuess
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Antiferromagnetic Coupling ◽  
Monoclinic Space Group ◽  
Helium Temperature ◽  
Temperature Dependent ◽  
Bridging Ligands ◽  
Square Planar ◽  
Super Exchange Interaction

[Cu2(L)(O2CMe)] · H2O (L = 1,3-Bis(2-Hydroxy-1-napthylideneamino)propan-2-ol) was synthesized and its crystal structure determined. (C27H23N2O5Cu2).H2O , monoclinic, space group P21/c, a = 11.795(3), b = 17.988(5), c = 12.005(6) Å, β = 109.99(3)°, V = 2393(2) Å3, Z = 4. Two copper(II) ions in a square-planar coordination are bridged by alkoxide and acetate oxygen atoms to form a dinuclear unit. The metal coordination sphere is four-coordinate, planar with an NO3 donor set. The dihedral angle between the two coordination planes is 6.34(9)°. The copper(II) centers are separated by 3.492(2) Å and weakly antiferromagnetically coupled (-2J = 163.6 cm-1 ), which follows from temperature-dependent magnetic susceptibility measurements in the temperature range 4.6 to 310 K. The Cu-O-Cu angle is 133.5(1)° in the super-exchange pathway. The weak antiferromagnetic coupling of the complex is interpreted in terms of countercomplementary effects of the different bridging ligands which participate in the super-exchange interaction. The magnetic moment at 310 K is ca. 2.7 B. M., but 0.2 B. M. at 4.6 K. The magnetic susceptibility is at a maximum near 140 K and decreases rapidly as the temperature is lowered to liquid helium temperature.

Unusual Potassium-η2-Aromatic Interactions in the Crystal Structure of the Diphenylarsenide Transfer Reagent, KAsPh2·2(1,4-Dioxane)

2013 ◽  
Vol 66 (10) ◽  
pp. 1260
Author(s):  
Michael C. Adams ◽  
George A. Koutsantonis ◽  
Brian W. Skelton ◽  
Allan H. White
Keyword(s):  
Crystal Structure ◽  
Potassium Atom ◽  
Two Dimensional ◽  
Sodium Complex ◽  
X Ray ◽  
The Third ◽  
Aromatic Interactions ◽  
Square Planar ◽  
Planar Array ◽  
Third Dimension

In attempting the metallation of 1,2-bis(diphenylarsino)ethane, the title compound KAsPh2·2(1,4-dioxane) was obtained and characterised with a single crystal X-ray structure determination. Like the sodium counterpart, which is a monosolvate, NaAsPh2·1,4-dioxane, the complex may be considered as a two-dimensional polymer, the potassium atoms being linked by bridging 1,4-dioxane units, the oxygen atoms of which form a quasi-square planar array about the potassium atom (K–O 2.676–2.839(3) Å). Unlike the sodium complex, in which arsenide bridging is an intrinsic motif in the construction of the polymer, the K⋯As distance here is long (3.4662(10) Å), with the anion being terminal/monodentate, and counterposed in what may be considered a quasi-octahedral coordination sphere, by a trans-approach to two atoms of a neighbouring aromatic ring (K⋯C(ar) 3.361, 3.416(4) Å), extending the polymer in the third dimension.

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