Constrained ferromagnetic coupling in dinuclear μ1,3-azido nickel(II) cryptate compounds. Crystal structure and magnetic behaviour of [Ni2(L1)(N3)(H2O)][CF3SO3]3·2H2O·EtOH {L1 = N[(CH2)2NHCH2(C6H4-m)CH2NH(CH2)2]3N} †

Ferromagnetic Interaction in μ1,3‐Cyanamido‐Derived Copper(II) Cryptates

“…With the symmetric azido linker, [2,3] the consequence of this interaction ranges from effective magnetic silence in some noncolinear 1,3-linked dimetallic systems [4] to ferromagnetic coupling in 1,1-and colinear 1,3-arrangements. [5,6] In cases in which the bridging pseudohalide is unsymmetrical, the options for coordination linkage and associated magnetic interaction pathways are further increased. [3b] Despite the considerable attention given to polynuclear bridging N 3 À systems, [2] the isoelectronic cyanamido analogue, NCN 2À , or the protonated hydrogencyanamido group, NCNH À , have attracted minimal interest.…”

The first metamagnetic one-dimensional molecular material with nickel(ii) and end-to-end azido bridges

“…10 However, two recently published results show the possibility of ferromagnetic materials with such bridging. 5,6 Our present result shows the possibility of a metamagnetic molecular material with only end-to-end azido bridged complexes. The present example is thus a new demonstration of the versatility of azido bridges for building molecular-based magnetic materials.…”

“…3 The prime coordination motif for bridging azido is end-on with ferromagnetic interaction and end-to-end having antiferromagnetic coupling. 4 To the best of our knowledge all compounds of Ni II with end-to-end azido bridges are antiferromagnetic with the exception of two compounds which are weakly ferromagnetic: one is a dimer 5 and the other a onedimensional chain of Ni II using a non-chelating capping ligand. 6 Examples of metamagnetic molecular materials in the metal-azido system with only end-to-end bridging azido mode are still lacking.…”

Synthesis, Structural Characterisation, and Monte Carlo Simulation of the Magnetic Properties of the 3D-Stacked Honeycomb Csn[{Mn(N3)3}n] and the Irregular Double Chain [{N(C2H5)4}n][{Mn2(N3)5(H2O)}n]

“…However, the (m-1,3)-azido bridge is known to mediate strong antiferromagnetic coupling between the magnetic ions. Recent MO calculations and experimental results show that for d 8 and d 9 cations such as copper(ii) or nickel(ii), FM coupling may be found for some extreme bond or torsion angles, [24] but for d 5 cations such as manganese(ii) fairly strong coupling is expected in any case. The spin coupling topology for 1 indicates a ground state S 0 and overall antiferromagnetic behaviour, whereas net weak ferromagnetic coupling is reasonably expected for 2.…”