Synthesis, structure, and magnetic property of a new Fe(II)-Fe(III) alternating single-chain magnet constructed with a methyl-substituted bpca– ligand was written by Tanaka, Hiroki;Kajiwara, Takashi;Kaneko, Yukihiro;Takaishi, Shinya;Yamashita, Masahiro. And the article was included in Polyhedron in 2007.Name: 4-Methylpicolinonitrile This article mentions the following:
A new Fe(II)-Fe(III) alternating single chain magnet, catena-[FeII(ClO4)(H2O){FeIII(bmpca)2}](ClO4)2, was synthesized using the methyl-substituted bpca– ligand, bmpca– (Hbpca and Hbmpca denote bis(2-pyridylcarbonyl)amine and bis(4-methyl-2-pyridylcarbonyl)amine, resp.). The one-dimensional complex shows ferrimagnetic behavior and frequency dependent out-of-phase ac susceptibility χ”m with the α parameter of 0.25 estimated by the semicircle Cole-Cole plot. The activation energy Δ was estimated to be 19(1) K from an Arrhenius plot. In the experiment, the researchers used many compounds, for example, 4-Methylpicolinonitrile (cas: 1620-76-4Name: 4-Methylpicolinonitrile).
4-Methylpicolinonitrile (cas: 1620-76-4) belongs to pyridine derivatives. Pyridine is diamagnetic and has a diamagnetic susceptibility of −48.7 × 10−6 cm3·mol−1.The molecular electric dipole moment is 2.2 debyes. The standard enthalpy of formation is 100.2 kJ·mol−1 in the liquid phase and 140.4 kJ·mol−1 in the gas phase. Pyridine groups exist in countless molecules, and their applications include catalysis, drug design, molecular recognition, and natural product synthesis.Name: 4-Methylpicolinonitrile