Variable temperature magnetic susceptibility and X ray crystal structure of a nickel II dimer with oxime bridging groups

Copper(II) and Nickel(II) Complexes of β-Aminoketoxime Ligand: Syntheses, Crystal Structures, Magnetism, and Nickel(II) Templated Coupling of Oxime with Nitrile

“…The fitting of the experimental magnetic moment for dimeric nickel(II) complex 2 yields J = −12 cm −1 , g Ni = 2.245, TIP = 400 × 10 −6 emu (Figure ). Therefore the exchange coupling between the nickel(II) centers through the oximate bridge is weak antiferromagnetic in nature showing the S = 0 ground state as observed for reported oximate-bridged dinickel(II) complexes. , …”

“…It has been shown that different modes of bindings of oxime ligands can connect transition metal ions generating oximate bridged dinuclear/polynuclear complexes that effectively transmit magnetic exchange coupling. , The magnetic properties of oximate complexes can easily be tuned by modification on the ligand backbone. The magnetic exchange coupling for a large number of oximate bridged polynuclear metal complexes have been reported in the literature particularly for dicopper(II) ,− and dinickel(II) complexes. , The in-plane oximate bridge between magnetic centers in dicopper(II) complexes displays strong antiferromagnetic coupling as a result of effective overlap of magnetic orbitals. On the other hand, out-of-plane oximate bridge reduces the overlap of magnetic orbitals and exhibits weak ferro- or antiferromagnetic coupling.…”

Binuclear complexes. Synthesis and characterization of the binuclear ligand 1,4-dihydrazinophthalazine bis(2'-pyridinecarboxaldimine) and the nickel complex .mu.-Chloro-tetraaqua[1,4-dihydrazinophthlazine bis(2'-pyridinecarboxaldimine)]dinickel(II) chloride dihydrate

“…The N(2)-N(3)-C(10) angle increases while the remaining ones in the "arm" decrease. The result is to align N (10) and N(l) in a more nearly linear fashion relative to the Ni atom. The ligand I appears to have some flexibility and therefore should be able to complex other metal ions.…”

Ferromagnetic versus antiferromagnetic exchange in oximato-bridged nickel(ii) complexes

“…Therefore, solely oximato-bridged Ni(II) complexes have been gathered for comparison of magnetic properties (Table S1, ESI †). [8][9][10][11]15,[19][20][21][22][23][24][25][26][27][28][29] The magneto-structural correlation of nickel oximato complexes has been previously studied, 11,18,23 , where the first item affords ferromagnetic contribution and the others antiferromagnetic (Fig. 5).…”