A dinuclear end-on azide-bridged copper(II) compound with weak antiferromagnetic interaction – Synthesis, characterization, magnetism and X-ray structure of bis[(μ-azido-κN1)-(azido-κN1)(1,3-bis(benzimidazol-2-yl)-2-methylpropane)copper(II)]

2013 ◽  
Vol 1036 ◽  
pp. 252-256 ◽  
Author(s):  
Gerard A. van Albada ◽  
Ilpo Mutikainen ◽  
Olivier Roubeau ◽  
Jan Reedijk
Keyword(s):  
Antiferromagnetic Interaction ◽  
X Ray ◽  
Weak Antiferromagnetic Interaction

Reactions of a series of ZnL, CuL and NiL Schiff base and non-Schiff base complexes with MCl2 salts (M = Cu, Ni, Mn): syntheses, structures, magnetic properties and DFT calculations

2018 ◽  
Vol 42 (5) ◽  
pp. 3683-3691 ◽  
Author(s):  
Jean-Pierre Costes ◽  
Carine Duhayon ◽  
Laure Vendier ◽  
Antonio J. Mota
Keyword(s):  
Magnetic Properties ◽  
Schiff Base ◽  
Dft Calculations ◽  
Antiferromagnetic Interaction ◽  
Schiff Base Complexes ◽  
Weak Antiferromagnetic Interaction

DFT calculations demonstrate that the weak antiferromagnetic interaction in the highly non-symmetric diphenoxo Cu–Cu bridge results from two antagonistic bridging pathways

Synthesis, Crystal Structure and Magnetic Properties of Novel Complex [μ-(NC)-Fe(CN)3(NO)-μ-(CN)-Cu(ept)]n·4nH2O (ept = N-(2-Aminoethyl)propane-1,3-diamine)

2001 ◽  
Vol 66 (10) ◽  
pp. 1490-1498 ◽  
Author(s):  
Zdeněk Smékal ◽  
Jiří Kameníček ◽  
Ingrid Svoboda ◽  
Albert Escuer
Keyword(s):  
Crystal Structure ◽  
Magnetic Measurement ◽  
Antiferromagnetic Interaction ◽  
Title Complex ◽  
The Novel ◽  
One Dimensional ◽  
X Ray ◽  
Magnetic Investigation ◽  
Novel Complex ◽  
Cyanide Ligands

The novel complex [μ-(NC)-Fe(CN)3(NO)-μ-(CN)-Cu(ept)]n·4nH2O (ept = N-(2-aminoethyl)- propane-1,3-diamine) was obtained by the reaction of Cu(ClO4)2·6H2O with N-(2-amino- ethyl)propane-1,3-diamine and Na2[Fe(CN)5NO]·2H2O in water. This compound was characterized by IR, UV-VIS and EPR spectroscopies and magnetic measurement. Single-crystal X-ray structure analysis revealed that the title complex has a one-dimensional polymeric structure containing hexacoordinate iron(II) with five cyanide ligands (two of them, in trans position, bridging) and one nitrosyl group, and pentacoordinate copper(II) with N-(2-aminoethyl)propane-1,3-diamine and two sites occupied by bridging cyanide ligands. Magnetic investigation revealed a very weak antiferromagnetic interaction between the copper atoms (superexchange interaction parameter J = -1.7(1) cm-1; H = -JSiSi+1) within the chain through the diamagnetic [Fe(CN)5NO]2- ions.

Synthesis, reactivity and property of 5,15-dithiaporphyrin copper(II) complex

2014 ◽  
Vol 18 (08n09) ◽  
pp. 675-678 ◽  
Author(s):  
Naruhiko Wachi ◽  
Takeshi Kondo ◽  
Satoru Ito ◽  
Satoru Hiroto ◽  
Ji-Young Shin ◽  
...  
Keyword(s):  
Magnetic Susceptibility ◽  
Solid State ◽  
Sulfur Atom ◽  
Good Yield ◽  
Axial Ligand ◽  
Antiferromagnetic Interaction ◽  
Free Base ◽  
X Ray Diffraction ◽  
Temperature Dependent ◽  
X Ray

Preparation of 5,15-dithiaporphyrin copper(II) complex was carried out by treatment of 5,15-dithiaporphyrin free-base with copper(II) acetate. X-ray diffraction analysis elucidated its dimeric structure in the solid state, in which the meso-sulfur atom served as an axial ligand to each pentacoordinated Cu ( II ) center. Temperature dependent magnetic susceptibility of the complex was measured to reveal the weak antiferromagnetic interaction between two Cu ( II ) centers in the solid state. 5,15-dithiaporphyrin Cu ( II ) complex was converted into 10-thiacorrole Cu ( II ) complex in good yield upon heating with triphenylphosphine in refluxing toluene.

Synthesis, X-Ray Crystal Structure and Magnetic Studies of a Biscopper(II) Complex of a C-Spiro Binucleating Linear Octadentate Ligand

1990 ◽  
Vol 43 (8) ◽  
pp. 1407 ◽  
Author(s):  
TM Donlevy ◽  
LR Gahan ◽  
TW Hambley ◽  
GR Hanson ◽  
A Markiewicz ◽  
...  
Keyword(s):  
Copper Atom ◽  
Dipole Interaction ◽  
Antiferromagnetic Interaction ◽  
Crystalline Solid ◽  
Magnetic Studies ◽  
Triclinic Space Group ◽  
X Ray ◽  
Triplet Splitting ◽  
Octadentate Ligand ◽  
Dark Blue

Reaction of the binucleating ligand 5,5-bis(4-amino-2-thiabutyl)-3,7- dithianonane-1,9-diamine (L1) with a copper(II) salt in aqueous solution, and in the presence of lithium dithionate, results in the isolation of a dark blue crystalline solid identified as [Cu2(L1)](S2O6)2.4H2O. Crystals of the complex are triclinic, space group Pī , a 8.227(2), b 13.103(3), c 16.423(4) Ǻ, α 68.68(2), β 86.68(2), γ 75.50(2)°, Z 2, R 0.026 (5039 F). The structure consists of two copper(II) atoms each of which is coordinated through two thioether and two primary amine atoms. The two copper sites are linked through a saturated spiro carbon atom. Each copper atom is also coordinated to one water molecule; one of the copper atoms is coordinated to an oxygen atom of one dithionate anion. Thus, one copper atom is six-coordinate (4+2 tetragonally distorted), and the other is five-coordinate. The intramolecular Cu...Cu distance is 7.127 Ǻ; the shortest intermolecular Cu...Cu distance is 6.591 Ǻ. The angle between the two N2S2 planes is 92.2°. Low-temperature magnetic studies indicate weak intra- and inter-molecular antiferromagnetic interactions with a singlet-triplet splitting 2J of -10 cm-1 and a θ of -5 K. E.p.r. studies indicate a magnetic dipole-dipole interaction between the two copper(II) sites and a weak intermolecular antiferromagnetic interaction.

Structure, Magnetic and Ion-Exchange Properties of Self-Assembled Triaza-Copper(II)-Oxalate Hybrides Having Nanoscale One-Dimensional Channel

2006 ◽  
Vol 6 (11) ◽  
pp. 3338-3342 ◽  
Author(s):  
Mee Chang ◽  
Minchul Chung ◽  
Byung Soo Lee ◽  
Chee-Hun Kwak
Keyword(s):  
Magnetic Property ◽  
Three Dimensional ◽  
Antiferromagnetic Interaction ◽  
Two Dimensional ◽  
One Dimensional ◽  
X Ray ◽  
Dimensional Network ◽  
Self Assembled ◽  
Exchange Properties ◽  
Strong Antiferromagnetic Interaction

The X-ray structure, porous and magnetic property of a self-assembled network 1 is described in detail. The single crystal X-ray analysis provides 1 as a three-dimensional network, which contains two-dimensional permanent ring forming nanoscale one-dimensional channels. The inter-replacement of perchlorate and hexafluorophosphate anions in solid 1 proves its porous structure. There is somewhat strong antiferromagnetic interaction (J = −74.1 cm−1) between two copper(II) ions through oxalate bridge and weak antiferromagnetic interaction (J = −5.1 cm−1) through AEP ligand.

scholarly journals One-dimensional lanthanide chain bridged by nitronyl nitroxide radical ligand: structure and magnetic properties

2020 ◽  
Vol 185 ◽  
pp. 04052
Author(s):  
Hui Yang Dong ◽  
Me Zhu
Keyword(s):  
Variable Temperature ◽  
Nitroxide Radical ◽  
Antiferromagnetic Interaction ◽  
Nitronyl Nitroxide ◽  
X Ray Diffraction ◽  
Monoclinic System ◽  
One Dimensional ◽  
X Ray ◽  
Ligand Structure ◽  
Radical Ligand

In order to synthesize the molecular magnetic material, the complex{Nd(hfac)3(NIT-5MeThien)}n(NIT-5MeThien=2-(5-Methyl-2ˊ-thienyl)-5--4,4,5,5-tetramethyl-imidazoline-1-oxyl-3-oxide) has been synthesized by the reaction using radical ligand and Nd(hfac)3•2H2O. X-ray diffraction analysis showed that the compound belongs to the monoclinic system and constituted by Nd(hfac)3 and NIT-5MeThien to obtain a one-dimensional chain which nitroxide radical acted as a bridged ligand through the N-O groups. Variable temperature magnetization of complex was shown the antiferromagnetic interaction between Nd(III) ion and nitroxide radical.

scholarly journals From Zero- to Three-Dimensional Heterobimetallic Coordination Polymers with the [Pt{SSC-N(CH2COO)2}2]4– Metalloligand

2020 ◽  
Author(s):  
Phil Liebing ◽  
Florian Oehler ◽  
Juliane Witzorke ◽  
Marten Schmeide
Keyword(s):  
Solid State ◽  
Ambient Temperature ◽  
Coordination Polymers ◽  
Structure Determination ◽  
Three Dimensional ◽  
Antiferromagnetic Interaction ◽  
Straightforward Manner ◽  
Thermal Stabilities ◽  
Metal Centers ◽  
X Ray

<br>Heterobimetallic compounds of the type M’2[Pt(L)2] (L = N-dithioato-iminodiacetate, {SSC-N(CH2COO)2}3–) containing different bivalent, oxophilic metals M’ were prepared in a straightforward manner from [Pt(H2L)2] and the respective metal acetates, M’(OAc)2 (M’ = Mg–Ba, M–Cu, Cd). X-ray structure determination revealed that the products exist as zero- (Mg), one- (Mn), two- (Fe, Co, Ni, Cd), or three-dimensional (Sr) assemblies in the solid state. As a result, the water solubilities and thermal stabilities of the products cover much wider ranges than it has been seen with M’2[M(L)2] compounds having different thiophilic metal centers (M = Ni, Pd, Pt). While most of the compounds show a typical diamagnetic (Mg–Ba, Cd) or paramagnetic (Mn, Co, Ni, Cu) behaviour at ambient temperature, for Fe2[Pt(L)2] ·4 H2O an antiferromagnetic interaction of the Fe atoms is assumed. <br>

scholarly journals Synthesis, Crystal Structure, and Spectral and Magnetic Properties of Chloro-Bridged Chain Complex of Dinuclear Ruthenium(II,III) 3,4,5-Triethoxybenzoate

2009 ◽  
Vol 4 (1) ◽  
pp. 90-96
Author(s):  
Hideaki Ishida ◽  
Makoto Handa ◽  
Ichiro Hiromitsu ◽  
Masahiro Mikuriya
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Broad Band ◽  
Chain Complex ◽  
Chain Structure ◽  
Antiferromagnetic Interaction ◽  
X Ray ◽  
Dinuclear Ruthenium ◽  
Complex Forms

A chloro-bridged chain complex constructed from paddlewheel-type dinuclear ruthenium(II,III) carboxylate units, [Ru2{3,4,5-(C2H5O)3C6H2CO2}4Cl]n·1.2nC2H5OH (1·1.2nC2H5OH), was synthesized and characterized by elemental analysis and IR and UV-vis spectroscopies. The single-crystal X-ray analysis showed that the complex forms a zig-zag chain structure, in which the chloroligands bridge the dinuclear units at the axial positions with the Ru1–Cl–Ru2 angle of 120.38(7)°. A broad band around 1144 nm and a band at 475 nm were observed in the diffused reflectance spectra and ascribed to a δ→δ* and a π(RuO, Ru2)→π*(Ru2) transitions, respectively. Temperature dependence of magnetic susceptibility showed that the antiferromagnetic interaction between the dinuclear units is weak (zJ = −0.8 cm−1) with D value of 60 cm−1.

Structural, Electrical and Magnetic Investigations of Conductive ZnO: Co Thin Films Deposited by DC Reactive Magnetron Co-Sputtering

2013 ◽  
Vol 543 ◽  
pp. 251-254 ◽  
Author(s):  
Soumia Lardjane ◽  
Mohammad Arab Pour Yazdi ◽  
Noureddine Fenineche ◽  
G. Merad ◽  
H.I. Feraoun ◽  
...  
Keyword(s):  
High Pressure ◽  
Diluted Magnetic Semiconductor ◽  
Magnetic Semiconductor ◽  
Antiferromagnetic Interaction ◽  
Reactive Magnetron ◽  
X Ray Diffraction ◽  
Dc Magnetron Sputtering ◽  
X Ray ◽  
Diluted Magnetic ◽  
Free Spins

Zn1-xCoxO (0 < x < 14.6) diluted magnetic semiconductor coatings have been obtained by reactive DC magnetron sputtering of metallic Zn and Co targets at high pressure and high temperature. The coatings structural properties have been investigated by X-ray diffraction. All as-deposited coatings are crystalized in ZnO structure and neither traces of metallic nor oxide Co-rich clusters were detected in the films. The temperature dependence of the magnetization shows a paramagnetic Curie-Weiss behavior with antiferromagnetic interaction due to the associated spins and simple paramagnetic curie behavior of isolated free spins.

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