Preparation, crystal structure and magnetic properties of di-2-pyridylamine (dpa) copper(II) complexes [Cu(dpa)(N3)2]n and [Cu2(dpa)2(NCO)4]

Double azido/cyanato bridged copper(II) dimers incorporating tridentate nitrogen donors Schiff base: Structure, EPR and magnetic studies

“…2.6 Å. In 2 this distance is 2.566(2) Å, very close to the value theoretically estimated [75][76][77][78][79][80][81][82][83][84][85][86][87][88][89], providing an explanation for the very weak ferromagnetic exchange observed in 2.…”

Syntheses, structures and magnetic properties of μ1,5-dicyanamide bridged di- and polynuclear manganese(II) complexes containing neutral N-donor Schiff bases: Control of coordination number and nuclearity by varying denticity

“…Self-assembly [11] of the metal ion with different organic spacers and suitable bridging units is an efficient approach to prepare such coordination molecules. Pseudohalides like azide, thiocyanate and cyanate [12][13][14][15][16][17] have been extensively used for the isolation of such coordination polymers and polymer-based supramolecular entities. Dicyanamide (dca), a larger pseudohalide molecular ionrod is now under active consideration because of its versatile coordination motifs [18][19][20][21][22][23][24][25] such as l 1,5 -, l 1,3 -, l 1,3,5 -, l 1,1,3,5 -and l 1,1,3,5,5 , exhibiting rich diversity in magnetic behaviours including ferromagnetism, antiferromagnetism and canted-spin antiferromagnetism.…”

3D purely inorganic lead-azide coordination polymer constructed by exclusive end-to-end azido binding

“…Zinc-azide complex [9] 2099, 2072 1291, 1323 Copper-azide complex [10] 2084, 2035 1292, 1333 Manganese-azide complex [11] 2107, 2082 1289, 1334…”

“…Although, variety of polynuclear metal azide complexes have been reported with various organic co-ligands where the structural and electronic versatility of the azide linker is applied to explore the properties like magnetism, liquid crystal behavior, photo-device activity and catalysis [7], however, no example of purely inorganic polynuclear metal-azido compound of lead, copper or mercury is present in the literature. Lead(II) center offers a large variety of coordination numbers (2)(3)(4)(5)(6)(7)(8)(9)(10) due to the presence of its 6 s electron pair with considerably large ionic radius. This flexibility in coordination number influences the construction of two discrete structural categories named as hemidirected (bond to ligand donor centers are directed to one part of the circling globe) and holodirected (bonds to the ligand donor centers are directed throughout the surrounding globe) coordination ( Fig.…”

“…Carranza et al described the structure and magnetic properties of copper azido complex involving an symmetric single end-on azido bridge [10]. Recently Mautner et al reported 1D Mn-azide systems with 2-aminopyridine and 4-azidopyridine having both end-on and end-to-end binding mode of the azide [11].…”