Crystal Structures, Topological Analyses, and Magnetic Properties of Manganese-Dihydroxyterephthalate Complexes

2010 ◽  
Vol 63 (2) ◽  
pp. 286 ◽  
Author(s):  
Qiang Gao ◽  
Fei-Long Jiang ◽  
Ming-Yan Wu ◽  
You-Gui Huang ◽  
Wei Wei ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Crystal Structures ◽  
Magnetic Measurements ◽  
Antiferromagnetic Coupling ◽  
Solvothermal Conditions ◽  
3D Framework

Two manganese(ii)-dihydroxyterephthalate complexes were obtained under solvothermal conditions: [Mn(H2dhtp)(H2O)2] n (1) and [Mn2(dhtp)(H2O)2] n (2) (H4dhtp = 2,5-dihydroxyterephthalate). The 3D framework of complex 1 is constructed by H2dhtp ligands joined to 1D carboxylate-bridged Mn(ii) chains, which features a (4,4)-connected PtS net. Complex 2 contains a novel inorganic honeycomb Mn(ii)–O layer, which is further connected into a 3D (4,8)-connected flu net by dhtp ligands. Magnetic measurements of 1 and 2 were performed in the range of 2–300 K and the results indicate that antiferromagnetic coupling exits in the manganese(ii) centres of both complexes.

scholarly journals Crystal Structures and Magnetic Properties of Two New Cobalt(II) Complexes with Triazole-Substituted Nitronyl and Imino Nitroxide Radicals

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Jing Chen ◽  
You-Juan Zhang ◽  
Kun-Tao Huang ◽  
Qiang Huang ◽  
Jun-Jie Wang
Keyword(s):  
Magnetic Properties ◽  
Metal Ions ◽  
Crystal Structures ◽  
Magnetic Measurements ◽  
Nitroxide Radicals ◽  
Triclinic Space Group ◽  
Space Group ◽  
Imino Nitroxide

Two new cobalt(II) complexes of formula [Co(hfac)2(NITphtrz) 1 and Co(hfac)2(IMphtrz) 2] have been prepared and characterized structurally [where NITphtrz = 4,4,5,5-tetramethyl-2-(2-phenyl-1,2,3-triazole-4-yl)imidazoline-1-oxyl-3-oxide and IMphtrz = 4,4,5,5-tetramethyl-2-(2-phenyl-1,2,3-triazole-4-yl)imidazoline-1-oxyl]. All of the complexes crystallize in an isomorphous triclinic space group P1- with the Co(II) ion octahedrally coordinated via the bidentate chelating mode. The magnetic measurements show that two complexes exhibit antiferromagnetic interactions between the metal ions and the nitroxide radicals.

scholarly journals Tetranuclear Hetro-Metal [MnIII2NiII2] Complexes Involving Defective Double-Cubane Structure: Synthesis, Crystal Structures, and Magnetic Properties

2019 ◽  
Vol 5 (1) ◽  
pp. 14
Author(s):  
Yuki Suemitsu ◽  
Ryuji Matsunaga ◽  
Takashi Toyofuku ◽  
Yasunori Yamada ◽  
Masahiro Mikuriya ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Crystal Structures ◽  
Infrared Spectra ◽  
Magnetic Measurements ◽  
Metal Core ◽  
X Ray ◽  
Structure Synthesis ◽  
Elemental Analyses

Tetranuclear hetero-metal MnIII2NiII2 complexes, [Mn2Ni2(L)4(OAc)2] (1) and [Mn2Ni2(L)4(NO3)2] (2) [H2L = N-(2-hydroxymethylphenyl)-5,6-benzosalicylideneimine], have been synthesized and characterized by X-ray crystal structure analyses, infrared spectra, and elemental analyses. The structure analyses revealed that the complexes have a defective double-cubane metal core connected by μ3-alkoxo bridges. Complexes consist of two bis-μ-alkoxo bridged MnIIINiII heteronuclear units making a dimer-of-dimers structure. The double-cubane cores are significantly distorted due to an effect of syn–syn mode acetato or nitrato bridges. Magnetic measurements indicate that weak antiferromagnetic interactions (Mn-Ni = −0.66 ~ −4.19 cm–1) are dominant in the hetero-metal core.

scholarly journals Synthesis, Crystal Structure and Magnetic Properties of 1D Chain Complexes Based on Azo Carboxylate Oxime Ligand

2021 ◽  
Vol 7 (7) ◽  
pp. 105
Author(s):  
Min Zeng ◽  
Xi Chen ◽  
Hui-Zhong Kou
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
High Spin ◽  
Magnetic Measurements ◽  
Antiferromagnetic Coupling ◽  
Dimensional Chain ◽  
One Dimensional ◽  
Chain Complexes ◽  
1D Chain ◽  
Oxime Ligand

Two carboxylate-bridged one-dimensional chain complexes, {[MnII(MeOH)2][FeIII(L)2]2}n (1) and {[MnII(DMF)2][MnIII(L)2]2·DMF}n (2) [H2L = ((2-carboxyphenyl)azo)-benzaldoxime], containing a low-spin [FeIII(L)2]− or [MnIII(L)2]− unit were synthesized. Magnetic measurements show that the adjacent high-spin MnII and low-spin MIII ions display weak antiferromagnetic coupling via the syn–anti carboxyl bridges, with J = −0.066(2) cm−1 for complex 1 and J = −0.274(2) cm−1 for complex 2.

scholarly journals An Mn(II) cluster–based coordination framework derived from a C3 symmetric ligand: Synthesis, structure, and magnetic properties

2020 ◽  
pp. 174751982092601
Author(s):  
Yong-Jun Bian ◽  
Yuan Tian ◽  
Ai-Hua Zhang ◽  
Yong-Qiang Chen
Keyword(s):  
Magnetic Properties ◽  
Structural Analysis ◽  
Three Dimensional ◽  
Antiferromagnetic Coupling ◽  
Coordination Framework ◽  
Ligand Synthesis ◽  
Solvothermal Conditions

A new coordination framework {[Mn7(L)4(OH)2(H2O)4(DMA)4]·8H2O·6DMA}n (H3 L = 3,3′,3″-[1,3,5-benzenetriyltris(carbonylimino)]tris(benzoate); DMA = N,N-dimethylacetamide) is synthesized under mixed solvothermal conditions. Structural analysis reveals that this complex possesses a three-dimensional framework with (3,10)- c topology based on different [Mn6] clusters. Moreover, magnetic investigations suggest that intra-cluster Mn(II) ions exhibit antiferromagnetic coupling.

In situ transformation of a tridentate to a tetradentate unsymmetric Schiff base ligand via deaminative coupling in Ni(ii) complexes: crystal structures, magnetic properties and catecholase activity study

2020 ◽  
Vol 7 (1) ◽  
pp. 247-259 ◽  
Author(s):  
Monotosh Mondal ◽  
Soumavo Ghosh ◽  
Souvik Maity ◽  
Sanjib Giri ◽  
Ashutosh Ghosh
Keyword(s):  
Magnetic Properties ◽  
Schiff Base ◽  
Metal Complexes ◽  
Crystal Structures ◽  
Schiff Base Ligand ◽  
Antiferromagnetic Coupling ◽  
Donor Ligand ◽  
Reduced Schiff Base ◽  
Catecholase Activity

An N2O donor reduced Schiff base in presence of Ni(ClO4)2·6H2O and SCN− transforms into N2O2 donor ligand via deaminative coupling. Metal complexes 1 and 3 exhibit catecholase like activity and antiferromagnetic coupling between the Ni(ii) ions.

Syntheses, Crystal Structures and Magnetic Properties of Rb2RuO4 and K2RuO4

2005 ◽  
Vol 60 (11) ◽  
pp. 1113-1117 ◽  
Author(s):  
Dieter Fischer ◽  
Rudolf Hoppe ◽  
Kailash M. Mogare ◽  
Martin Jansen
Keyword(s):  
Magnetic Properties ◽  
Single Crystal ◽  
Crystal Structures ◽  
Oxidation State ◽  
Magnetic Measurements ◽  
Magnetic Moments ◽  
Ruthenium Dioxide ◽  
Crystal Data ◽  
Orthorhombic Space Group ◽  
Antiferromagnetic Transitions

Potassium and rubidium oxoruthenates, A2RuO4, were synthesized from the alkali peroxides/ hyperoxides and ruthenium dioxide. Both compounds crystallize in the orthorhombic space group Pnma (no. 62), (K2RuO4: a = 7.673(2), b = 6.153(2) and c = 10.564(3)Å , Z = 4, 796 unique reflections, R=3.5%; Rb2RuO4: a =8.106(2), b = 6.270(1) and c =11.039(2)Å , Z =4, 889 unique reflections, R = 3.6%). The crystal structures, as determined from single crystal data, are of the β - K2SO4 type. Magnetic measurements reveal that both compounds are paramagnetic down to temperatures of around 60 K and further exhibit antiferromagnetic transitions, at around TN = 9 K for Rb2RuO4, and two transitions with TN = 14 K and 4 K for K2RuO4. The magnetic moments as determined applying Curie-Weiss law for both compounds are 2.68 μB, thus confirming the oxidation state +6 of ruthenium.

Heterobimetallic complexes from 0D clusters to 3D networks based on various polycyanometallates and [Cu(dmpn)2]2+ (dmpn = 2,2-dimethyl-1,3-diaminopropane): synthesis, crystal structures and magnetic properties

CrystEngComm ◽  
2020 ◽  
Vol 22 (16) ◽  
pp. 2806-2816
Author(s):  
Xiaoyun Hao ◽  
Jingwen Shi ◽  
Yong Dou ◽  
Tong Cao ◽  
Zhen Zhou ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Crystal Structures ◽  
Antiferromagnetic Coupling ◽  
Copper Compound ◽  
Heterobimetallic Complexes ◽  
3D Networks

Six new cyanide-bridged complexes (0–3D) have been assembled by employing one copper compound and six cyano precursors. Investigation of the magnetic properties revealed the ferro- or antiferromagnetic coupling between FeIII/CrI ion and CuII ion.

On the phosphors Na5M(WO4)4 (M = Y, La–Nd, Sm–Lu, Bi) – crystal structures, thermal decomposition, and optical and magnetic properties

2020 ◽  
Vol 49 (24) ◽  
pp. 8209-8225 ◽  
Author(s):  
Matthias Hämmer ◽  
Oliver Janka ◽  
Judith Bönnighausen ◽  
Steffen Klenner ◽  
Rainer Pöttgen ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Magnetic Properties ◽  
Crystal Structures ◽  
Crystal Chemistry ◽  
Magnetic Measurements ◽  
Optical And Magnetic Properties

An exploration of the crystal chemistry of exciting luminescent title compounds – possible phosphors – is discussed also employing magnetic measurements.

The supramolecular interaction mediated chiral 1D cyanide-bridged metamagnet: synthesis, crystal structures and magnetic properties

2014 ◽  
Vol 43 (3) ◽  
pp. 945-949 ◽  
Author(s):  
Daopeng Zhang ◽  
Yongzhong Bian ◽  
Jie Qin ◽  
Ping Wang ◽  
Xia Chen
Keyword(s):  
Magnetic Properties ◽  
Crystal Structures ◽  
Antiferromagnetic Coupling ◽  
Supramolecular Interaction ◽  
Single Chain ◽  
One Dimensional ◽  
Chain Complexes

Two cyanide-bridged enantiopure one-dimensional single chain complexes have been synthesized and structurally characterized. Systematically magnetic investigations show the antiferromagnetic coupling between the Mn(iii)–Fe(iii) centers and the metamagnetic behavior at about 5.0 K.

Sign in / Sign up

Export Citation Format

Share Document