Magnetic Behavior of Carboxylate and β-Diketonate Lanthanide Complexes Containing Stable Organometallic Moieties in the Core-Forming Ligand

• Published in: Magnetochemistry 2016-12, Vol.2 (4), p.38
• Main Authors: Efimov, Nikolay, Koroteev, Pavel, Gavrikov, Andrey, Ilyukhin, Andrey, Dobrokhotova, Zhanna, Novotortsev, Vladimir
• Format: Article
• Language: English
• Subjects: Carboxylic acids; Crystal structure; Gadolinium; Ligands; Magnetic measurement; Magnetic properties; Molecular structure; Nitrates; Rare earth compounds; Rare earth elements
• ISSN: 2312-7481; 2312-7481
• DOI: 10.3390/magnetochemistry2040038

Information concerning the structures of compounds of rare earth elements with carboxylic acids and a β-diketone containing stable organometallic moieties that we obtained previously is presented. Additional results for 15 complexes with the [Gd2O2] core allowed confirming and improving the correlation between JGd–Gd′ and the Gd…Gd distance for complexes of this type that we found earlier. For the first time, dc and ac magnetic measurements were carried out for the formerly-described complex [Dy2(O2CCym)4(NO3)2(DMSO)4] (2), Cym = (η5-C5H4)Mn(CO)3), and two new binuclear complexes, namely [Dy2(O2CFc)4(NO3)2(DMSO)4] (3), and [Dy2(O2CFc)6(DMSO)2(H2O)2] (4), Fc = (η5-C5H4)Fe(η5-C5H5)). For binuclear [Dy2(O2CCym)6(DMSO)4] (1), as well as for a 1D-polymer [Dy(O2CCym)(acac)2(H2O)]n (6), ac magnetic measurements were carried out more precisely. The characteristics of a single-molecule magnet and of a single-chain magnet were determined for Complexes 2 and 6, respectively.