A Unique Ni<sup><scp>II</scp></sup> Complex with Three Different Azido Bridges: Magneto‐Structural Correlations in the First Triply Alternating <i>S</i> = 1 Chain

Ribas, Joan; Monfort, Montserrat; Resino, Immaculada; Soláns, Xavier; Rabu, Pierre; Maingot, Fabrice; Drillon, Marc

doi:10.1002/anie.199625201

Cited by 68 publications

(31 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It may be relevant to compare the g and D values observed for 1 with those of the reported cases. Although the g values in distorted octahedral nickel(II) containing compounds are usually less than or equal to 2.2, [9b,11b–11d,15] larger values like 2.23,16a 2.26,9b,16b 2.27,8a 2.2810b,11d and even 2.35,16b 2.3815d and 2.3916c have been observed previously. Regarding the D parameter, there are cases where either D is not taken in simulation or the value of this parameter has been found to be very small.…”

Section: Resultsmentioning

confidence: 79%

Magnetic and Electrochemical Properties of a Heterobridged μ‐Phenoxido–μ_1,1‐Azide Dinickel(II) Compound: A Unique Example Demonstrating the Bridge Distance Dependency of Exchange Integral

et al. 2009

View full text Add to dashboard Cite

Ein Härtetest für den Einfluss elektronischer Stabilisierung ist die Ringöffnung von trans‐3,4‐Bis(trimethylsilyl)cyclobuten. Die beiden sperrigen Silylgruppen bevorzugen trotz des räumlichen Anspruchs eine Einwärtsrotation. Die elektronische Stabilisierung, die aus der Delokalisation der Elektronendichte des HOMO in die beiden antibindenden Orbitale resultiert, überwindet die sterische Hinderung (siehe Bild).

show abstract

Section: Resultsmentioning

confidence: 79%

Magnetic and Electrochemical Properties of a Heterobridged μ‐Phenoxido–μ_1,1‐Azide Dinickel(II) Compound: A Unique Example Demonstrating the Bridge Distance Dependency of Exchange Integral

et al. 2009

View full text Add to dashboard Cite

show abstract

“…In addition, the dinuclear Ni(II) complexes also possess interesting magnetic properties. The exchange interactions of such complexes changes dramatically in the presence of exogenous bridging group, e.g., chloro and azido ions, in their close proximity as these groups show diverse magnetic properties depending on their orientation with respect to the magnetic center [24][25][26][27][28][29]. Therefore, these systems still remain interesting for further investigations.…”

Section: Introductionmentioning

confidence: 99%

Double azido-bridged and mixed-bridged binuclear copper(II) and nickel(II) compounds with N,N,O-donor Schiff bases: Synthesis, structure, magnetic and DFT study

Chakrabarty¹,

Giri

Schollmeyer

et al. 2015

Polyhedron

View full text Add to dashboard Cite

“…25 -[V(CN) 5 ]´2H 2 O (T C 230 K), [5] and V[Cr(CN) 6 ] 0.86 (T C 315 K). [9] In fact, many azide complexes with a wide range of structural variety spanning from dinuclear, [10] tetranuclear, [11] cubane, [12] one-dimensional, [13] two-dimensional, [14] to three-dimensional [15] arrays have been reported to date. [8] In the light of factors that affect magnetic exchange pathways between the paramagnetic centers, the proper use of bridging ligands is of importance, since they influence the magnetic strength and nature in a molecule.…”

Section: Introductionmentioning

confidence: 99%

Unusual Ferromagnetic Couplings in Single End-to-End Azide-Bridged Cobalt(II) and Nickel(II) Chain Systems

et al. 2001

View full text Add to dashboard Cite

Two new one-dimensional single azide-bridged metal(II) compounds [[M(5-methylpyrazole)4(N3)]n](ClO4)n(H2O)n [M = Co (1a), Ni (2a)] were prepared by treating an M(II) ion with stoichiometric amount of sodium azide in the presence of four equivalents of the 3(5)-methylpyrazole ligand. The isostructural compounds 1a and 2a crystallize in the monoclinic space group P2(1)/n. The azide bridging ligands have a unique end-to-end coordination mode that brings two neighboring metal centers into a cis-position with respect to the azide unit to form single end-to-end azide-bridged cobalt(II) and nickel(II) chains. The two neighboring metal atoms at inversion centers adopt octahedral environments with four equatorial 3(5)-methylpyrazole ligands and two axial azide bridges. Two adjacent equatorial least-squares planes form dihedral angles of 60.5 degrees and 60.6 degrees for Co and Ni, respectively. In addition, the metal-azide-metal units form large M-N3-M torsion angles, which are magnetically important geometrical parameters, of 71.6 degrees for M=Co and 75.7 degrees for M=Ni. It should also be noted that the M-N-N angles associated with end-to-end azide group, another magnetically important structural parameter, fall into the experimentally observed range of 120-140 degrees as 128.3(3) and 147.8(3) degrees for cobalt species and 128.4(2) and 146.1(3) degrees for nickel species; these values deviate from the theoretical value of around 164 degrees at which the incidental orthogonality is achieved under the torsion angle of 0 degrees. The compounds 1a and 2a have unique magnetic properties of ferromagnetism, zero-field splitting, and spin canting. The MO calculations indicate that the quasiorthogonality between the magnetic orbitals of metal ions and the p atomic orbitals of the bridging azide is possible in the observed structures and leads to the ferromagnetism. The spin canting related to the perturbation of ferromagnetism arises from the magnetic anisotropy and antisymmetric interactions judged by the structural parameters of the zero-field splitting and the tilted MN4 planes in a chain. The enhancement of magnetic interactions was accomplished by dehydrating the chain compounds to afford two soft magnets with critical temperature T(C) and coercive field of 2 K and 35 G for 1b and 2.3 K and 20 G for 2b, respectively.

show abstract

A Unique Ni^II Complex with Three Different Azido Bridges: Magneto‐Structural Correlations in the First Triply Alternating S = 1 Chain

Cited by 68 publications

References 34 publications

Magnetic and Electrochemical Properties of a Heterobridged μ‐Phenoxido–μ_1,1‐Azide Dinickel(II) Compound: A Unique Example Demonstrating the Bridge Distance Dependency of Exchange Integral

Magnetic and Electrochemical Properties of a Heterobridged μ‐Phenoxido–μ_1,1‐Azide Dinickel(II) Compound: A Unique Example Demonstrating the Bridge Distance Dependency of Exchange Integral

Double azido-bridged and mixed-bridged binuclear copper(II) and nickel(II) compounds with N,N,O-donor Schiff bases: Synthesis, structure, magnetic and DFT study

Unusual Ferromagnetic Couplings in Single End-to-End Azide-Bridged Cobalt(II) and Nickel(II) Chain Systems

Contact Info

Product

Resources

About

A Unique NiII Complex with Three Different Azido Bridges: Magneto‐Structural Correlations in the First Triply Alternating S = 1 Chain

Cited by 68 publications

References 34 publications

Magnetic and Electrochemical Properties of a Heterobridged μ‐Phenoxido–μ1,1‐Azide Dinickel(II) Compound: A Unique Example Demonstrating the Bridge Distance Dependency of Exchange Integral

Magnetic and Electrochemical Properties of a Heterobridged μ‐Phenoxido–μ1,1‐Azide Dinickel(II) Compound: A Unique Example Demonstrating the Bridge Distance Dependency of Exchange Integral

Double azido-bridged and mixed-bridged binuclear copper(II) and nickel(II) compounds with N,N,O-donor Schiff bases: Synthesis, structure, magnetic and DFT study

Unusual Ferromagnetic Couplings in Single End-to-End Azide-Bridged Cobalt(II) and Nickel(II) Chain Systems

Contact Info

Product

Resources

About

A Unique Ni^II Complex with Three Different Azido Bridges: Magneto‐Structural Correlations in the First Triply Alternating S = 1 Chain

Magnetic and Electrochemical Properties of a Heterobridged μ‐Phenoxido–μ_1,1‐Azide Dinickel(II) Compound: A Unique Example Demonstrating the Bridge Distance Dependency of Exchange Integral

Magnetic and Electrochemical Properties of a Heterobridged μ‐Phenoxido–μ_1,1‐Azide Dinickel(II) Compound: A Unique Example Demonstrating the Bridge Distance Dependency of Exchange Integral