A new one-dimensional thiocyanato-bridged bimetallic compound [Cu(en)2Mn(NCS)4(H2O)2]n. Synthesis, crystal structure, and magnetic properties

1998 ◽  
Vol 76 (7) ◽  
pp. 1102-1107 ◽  
Author(s):  
Hui-Zhong Kou ◽  
Dai-Zheng Liao ◽  
Peng Cheng ◽  
Zong-Hui Jiang ◽  
Shi-Ping Yan ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Antiferromagnetic Interaction ◽  
Zero Field ◽  
Spin Multiplicity ◽  
Zero Field Splitting ◽  
Field Splitting ◽  
Coordination Environment ◽  
One Dimensional ◽  
D Model ◽  
Splitting Effect

A bimetallic compound [Cu(en)2Mn(NCS)4(H2O)2]n (en = ethylenediamine) has been prepared and its structure determined. It crystallizes in space group , with a = 7.432(1), b = 7.492(1), c = 9.751(2) Å, α = 91.00(3)°, ß = 99.14(3)°, γ = 112.51(3)°, and Z = 1. The structure consists of one-dimensional chains in which alternating Mn(II) and Cu(II) ions are bridged by NCS ligands. The coordination environment is octahedral for Mn(II) and elongated octahedral for Cu(II). From magnetic susceptibility measurements the compound was found to exhibit a ground state of low-spin multiplicity. Comparison between theory and experimental has been made using 1-D model and taking into account the zero-field splitting effect. The decrease in chimT observed at low temperature for the compound is attributed to a dominant zero-field splitting of the single Mn(II) ions with a weak antiferromagnetic interaction superimposed between the Mn(II) ions via the NCS-Cu-SCN pathway within each chain. Key words: crystal structure, copper(II) complexes, manganese(II) complexes, thiocyanate bridges, bimetallic complexes.

Modulation of the coordination environment: a convenient approach to tailor magnetic anisotropy in seven coordinate Co(ii) complexes

2016 ◽  
Vol 52 (4) ◽  
pp. 753-756 ◽  
Author(s):  
Mamon Dey ◽  
Snigdha Dutta ◽  
Bipul Sarma ◽  
Ramesh Ch. Deka ◽  
Nayanmoni Gogoi
Keyword(s):  
Magnetic Anisotropy ◽  
Zero Field ◽  
Zero Field Splitting ◽  
Field Splitting ◽  
Coordination Environment ◽  
Zero Field Splitting Parameter ◽  
Convenient Approach ◽  
Splitting Parameter ◽  
Remarkable Deviation

Subtle modulation of the coordination environment in seven coordinate Co(ii) complexes leads to a remarkable deviation in the axial zero field splitting parameter (D) in a predictable fashion.

The Dimeric Structure of Bis(1,3-Dimethylcyclopentadienyl)titanium(III) Chloride

1996 ◽  
Vol 61 (9) ◽  
pp. 1285-1294 ◽  
Author(s):  
Karel Mach ◽  
Vojtech Varga ◽  
Günter Schmid ◽  
Jörg Hiller ◽  
Ulf Thewalt
Keyword(s):  
Crystal Structure ◽  
Triplet State ◽  
Structure Analysis ◽  
Crystal Structure Analysis ◽  
Epr Spectra ◽  
Zero Field ◽  
Zero Field Splitting ◽  
Field Splitting ◽  
X Ray ◽  
Dimeric Structure

The X-ray crystal structure analysis of bis(1,3-dimethylcyclopentadienyl)titanium(III) chloride revealed that it is a centrosymmetric chlorine-bridged dimer [(η5-C5H3Me2)2Ti(μ-Cl)]2 (1) with the Ti-Ti distance of 3.9155(8) Å. Its skeleton is virtually identical with those of the [(η5-C5H5)2Ti(μ-Cl)]2 and [(η5-C5H4Me)2Ti(μ-Cl)]2 dimers. The solution EPR study proved that 1 remains a dimer in toluene whereas it dissociates in 2-methyltetrahydrofuran (MTHF) to give (η5-C5H3Me2)2TiCl . MTHF. The EPR spectra of frozen toluene solutions proved that 1 forms the triplet state whose g-tensor and zero-field splitting D are virtually the same as those of [(η5-C5H5)2Ti(μ-Cl)]2.

Spectral Fine Structure, Zero-Field Splitting Parameters and Crystal Structure of Sapphire

2008 ◽  
Vol 28 (11) ◽  
pp. 2204-2208
Author(s):  
殷春浩 Yin Chunhao ◽  
吕海萍 Lü Haiping ◽  
李泽彬 Li Zebin ◽  
魏雪松 Wei Xuesong ◽  
钮应喜 Niu Yingxi ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Fine Structure ◽  
Zero Field ◽  
Zero Field Splitting ◽  
Field Splitting

scholarly journals Magnetostructural Studies on Zigzag One-Dimensional Coordination Polymers Formed by Tetraamidatodiruthenium(II,III) Paddlewheel Units Bridged by SCN Ligands

2019 ◽  
Vol 5 (3) ◽  
pp. 40 ◽  
Author(s):  
Sara Moreno-Da Silva ◽  
Patricia Delgado-Martínez ◽  
Miguel Cortijo ◽  
Rodrigo González-Prieto ◽  
José Luis Priego ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Coordination Polymers ◽  
Ground State ◽  
Magnetic Data ◽  
Zero Field ◽  
Donor Atom ◽  
Zero Field Splitting ◽  
One Dimensional ◽  
Linkage Isomerism ◽  
New Compounds

We report herein on three zigzag one-dimensional coordination polymers of {[Ru2(μ-NHOCR)4](μ-SCN)}n (R = o-Me-C6H4 (2), m-Me-C6H4 (3), p-Me-C6H4 (4)) formula. These new compounds have been obtained by reaction of the corresponding [Ru2(μ-NHOR)4(THF)2](BF4) complex with (NBu4)(SCN) under different synthetic conditions. The crystal structure of [Ru2(μ-NHOCC6H4-o-Me)4(THF)2](BF4) (1), 2 and 3 are presented. A cis-(2,2) arrangement of the amidate ligands of the [Ru2(μ-NHOCR)4]+ units is observed in all cases. Interestingly, the structures of 2 and 3 show linkage isomerism in alternated tetraamidatodiruthenium units whose axial positions are occupied by the same type of donor atom of the SCN ligands. This results in zigzag chains with a Ru-S-C angle of 98.97° and Ru-N-C angle of 169.36° in the case of 2 and 97.99° and 159.26°, respectively, in the case of 3. The magnetic data obtained for 2–4 are indicative of a σ2π4δ2(π*δ*)3 ground state (S = 3/2) and a large zero-field splitting (ZFS) in all cases (D = 54.57, 62.72 and 43.00 cm−1 for 2–4, respectively). Similar small antiferromagnetic interactions between diruthenium units (zJ = −0.93, −0.79 and −1.11 cm−1 for 2–4, respectively) are estimated for all the polymers, suggesting an analogous zigzag arrangement of the chains for 4.

Spectroscopic studies and crystal structure of bis(N-2-pyridinylcarbonyl-2-pyridinecarboximidato) manganese(II) monohydrate: Zero-field splitting param

Polyhedron ◽  
1990 ◽  
Vol 9 (22) ◽  
pp. 2699-2704 ◽  
Author(s):  
Dolores Marcos ◽  
José-Vicente Folgado ◽  
Daniel Beltrán-Porter ◽  
Maria T. Do Prado-Gambardella ◽  
Sandra H. Pulcinelli ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Spectroscopic Studies ◽  
Zero Field ◽  
Zero Field Splitting ◽  
Field Splitting

Correlation of Zero Field Splittings and Site Distortions. VII. FeCl4- in CsGaCL4 with Crystal Structure Refinement

1984 ◽  
Vol 39 (12) ◽  
pp. 1204-1207 ◽  
Author(s):  
R. Büscher ◽  
G. Lehmann ◽  
G. Henkel ◽  
B. Krebs
Keyword(s):  
Crystal Structure ◽  
Structure Refinement ◽  
Zero Field ◽  
Crystal Structure Refinement ◽  
Zero Field Splitting ◽  
Field Splitting ◽  
Lower Limits ◽  
Limits Of Error

A crystal structure refinement for CsGaCl4 resulted in considerably lower limits of error than older data from the literature. These were used for a superposition analysis of EPR data for Fe3+ in this compound. The experimental zero field splitting (ZFS) pattern could be very satisfactorily reproduced with the intrinsic ZFS parameter b̅2 = 0.6 cm-1. Thus like for other ligands b̅2 for Fe3+ is again several times larger than for the isoelectronic Mn2+ .

Correlating the axial Zero Field Splitting with the slow magnetic relaxation in GdIII SIMs

2021 ◽  
Author(s):  
Júlia Mayans ◽  
Albert Escuer
Keyword(s):  
Magnetic Relaxation ◽  
Zero Field ◽  
Zero Field Splitting ◽  
Field Splitting ◽  
Slow Magnetic Relaxation

A possible relation between the value of the axial Zero Field Splitting and the occurrence of field-induced slow magnetic relaxation has been established for a new gadolinium(iii) compound.

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