Dinuclear and polynuclear Cu(II) azido-bridged compounds with 7-azaindole as a ligand. Synthesis, characterization and 3D structures

Coexistence of Spin Canting and Metamagnetism in a One-Dimensional Mn(II) Compound Bridged by Alternating Double End-to-End and Double End-On Azido Ligands and the Analog Co(II) Compound

“…Therefore, this compound was not considered suitable for the study of the magnetic properties. In contrast, pure bulk In earlier reports from our laboratories, we have given attention to metal-azide compounds as bridging ligands for dinuclear compounds, or higher aggregates up to 2D networks [15][16][17][18] and we have found both ferromagnetic and antiferromagnetic cases. The ferromagnetic cases are only known for the EO azido-bridged compounds.…”

Metal ions directing the geometry and nuclearity of azido-metal(ii) complexes derived from bis(2-(3,5-dimethyl-1H-pyrazol-1-yl)ethyl)amine

“…5) and lattice water molecules. Cd 20)⋯N (23) 3.349( 7) 155( 8) O(1)-H( 21)⋯N (13) [−x + 1/2,y + 1/2,−z + 1/2] 2.895( 7) 164( 9)…”

“…[1][2][3][4] In addition to the terminal monodentate nature of the azido ligand [1][2][3][4] many bridging coordination modes were reported where a magnetic super-exchange mechanism is known to occur through various modes. [5][6][7][8][9][10][11][12][13][14][15][16] These include single and double μ 1,3 -N 3 (end-to-end, EE) [5][6][7][8][9][10][11][12][13][14][15][16][17] and μ 1,1 -N 3 (endon, EO), [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29] μ 1,1,3 -N 3 , μ 1,1,1 -N 3 ...…”

“…11,31,33,35,[37][38][39][40] Some of these bonding modes led to the formation of metal complexes of interesting structures with different nuclearity and dimensionality (1D, 2D and 3D). 8,10,13,14,22,[28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44] The diverse structural features of these complexes depend largely on the nature of the coordinated coligands and to some extent on the nature of the central metal ion; its oxidation state, the coordination number and geometry of the complex. Also, the steric environment imposed by the coligands is believed to play a crucial role in determining the coordination mode which can be adapted by a certain metal ion.…”

A rare example of a double metamagnetic transition leading to 2D and 3D long-range order in the two-dimensional pyrazine- and azido-bridged cobalt(ii) compound [Co(pyz)(N3)2]

“…pounds of the type M(N 3 ) 2 M, as well as polynuclear compounds, including linear chains of formula ⋯(N 3 ) 2 -M-(N 3 ) 2 -M-(N 3 ) 2 ⋯, where the azido ligands may act as end-on, end-toend or even as alternating end-on/end-to-end bridges. 1,4,[14][15][16][17] The magnetic properties of these discrete and polynuclear complexes may vary from ferro-to antiferromagnetic, [18][19][20][21] although ferromagnetic coupling has only been reported in end-on azido-bridged compounds. The choice of the non-bridging co-ligands plays an important role on the structure of the final compounds and may also determine the bridging mode (end-on or end-to-end or a combination of both) of the azido bridges, as observed in azido complexes with planar heterocyclic co-ligands.…”