Thiourea complexes of neodymium(III) and gadolinium(III) iodides. synthesis and structure

• Main Authors: L. Yu. Alikberova, D. V. Albov, T. A. Antonenko, I. M. Kochetova, N. S. Rukk
• Format: Article
• Language: Russian
• Published: MIREA - Russian Technological University 2010-06-01
• Series: Тонкие химические технологии
• Subjects: neodymium(iii) iodide; gadolinium(iii) iodide; thiourea; complexes; crystal structure; ir spectra; synthesis
• Online Access: https://www.finechem-mirea.ru/jour/article/view/969
• ISSN: 2410-6593; 2686-7575

Data concerning the synthesis, IR-spectra, and single crystal X-ray studies for neodymium iodide and gadolinium iodide - thiourea complexes of the general composition [Ln(H2O)9]I3 · 2CS(NH2)2 (Ln = Nd, Gd) are presented. It has been demonstrated that in the solid state the title compounds are composed from [Ln(H2O)9]3+cations (polyhedron: monocapped tetragonal antiprism) as well as from non-coordinated thiourea molecules and iodide ions. Due to hydrogen bond formation mutually perpendicular flat molecules of thiourea are combined into goffered layers, nonaaquacations of lanthanides and iodide-ions being located in the cavities between these layers. The existence of hydrogen bonding between the mentioned species has been underlined.