Petrenko, Yuliia P. published the artcileSynthesis, crystal structure and magnetic properties of new copper(II) complexes based on 3-(2-pyridyl)-1,2,4-triazole, Formula: C6H4N2, the main research area is copper pyridyltriazole sulfate solvate complex preparation crystal structure; magnetic property copper pyridyltriazole sulfate solvate complex.
The synthesis, crystal structure, spectroscopic and magnetic properties of binuclear [Cu2(L)2(SO4)(H2O)3]·3H2O (4a) and tetranuclear [Cu4(HL)2(L)4(DMF)2(SO4)2]·DMF (4b) copper(II) complexes are reported (HL is 3-(pyridine-2-yl)-1,2,4-triazole). Potentiometric titrations, ESI-MS and spectrophotometric studies of complex formation in MeOH/H2O solutions indicated the presence of monomeric [CuHL]2+, dinuclear [Cu2L2]2+ and [Cu2L2(OH)]+, and trinuclear [Cu2L3]+ and [Cu2L3(OH)] species. The small N,N-nucleating ligand HL leads to a supramol. formation of the complexes. The ligand comprises a triazole moiety substituted by pyridine group, strategically located to form chelate metalocycles. The basis of both complexes is two metal centers bridged via N1-N2 diazine grouping of a triazole ring. For complex 4b two HL coordinate in acido form via NPy and N4 of azole moiety as well. There are significant differences in the polyhedrons, namely nuclearity and Cu…Cu separations Complexes were characterized by elemental anal., mass-spectrometry, IR- spectroscopy and x-ray anal. Magnetic measurements revealed that both compounds exhibit antiferromagnetic interaction. The magnetic susceptibility data were interpreted on the basis of the spin Hamiltonian in the temperature range (2-300 K) using the dinuclear (4a:J1 = -52.41 cm-1) and tetranuclear (4b:J1 = -53.10 cm-1 to J2 = -0.14 cm-1) models.
Inorganica Chimica Acta published new progress about Antiferromagnetic exchange. 100-70-9 belongs to class nitriles-buliding-blocks, name is Picolinonitrile, and the molecular formula is C6H4N2, Formula: C6H4N2.
Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts