Trinuclear and mononuclear nickel(II) complexes incorporating tridentate 2-[(pyridine-2-ylimine)methyl]phenol ligand: Syntheses, crystal structures and magnetic properties

Two chiral complexes constructed from mixed L-histidine and L-alanine/thiocyanate ligands: Synthesis, structure, ferromagnetic and ferroelectric properties

“…Below 50 K, the χ M T value drops abruptly to 0.87 cm 3 mol − 1 K at 2 K, because of intermolecular antiferromagnetic interactions and/or other factors (such as zero field splitting). The temperature dependence of the reciprocal susceptibility (χ M − 1 ) for 2 can be fitted by the Curie-Weiss law (χ M = C/(T − θ)) above 2 K, giving a Curie constant C =1.27 cm 3 mol − 1 K and a Weiss constant θ = +0.20 K. The C value is larger than the expected value 1.00 cm 3 mol − 1 K for one Ni(II) ions (S = 2/2), which is consistent with literature reports [29,30]. The positive value of θ further indicates the presence of ferromagnetic behavior (inset of Fig.…”