Reactions of LnI3·nH2O, I2, and urea (Ur) produced rare-earth polyiodides [Ln(Ur)8][I5][I3]2[I2] (Ln = Pr, Nd, Sm–Tb) and [Ln(Ur)7][I3]3
(Ln = Ho, Er); the crystal structures of the praseodymium and holmium compounds were solved. In [Ho(Ur)7][I3]3, holmium ions are located at the centers of distorted pentagonal bipyramids (three independent complex cations) and an octahedra with a
split vertex (one independent cation) of oxygens of coordinated urea. All triiodide anions are symmetric and linear; they are united in almost linear infinite chains by short contacts. The almost parallel chains of iodine atoms form infinite walls of honeycomb-like channels, and the columns
of the complex cations are localized in these channels. Complex [Pr(Ur)8][I5][I3]2[I2] is isotructural to the earlier reported [Dy(Ur)8][I5][I3]2[I2].
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
Rare earth metals;
Document Type: Research Article
Department of Inorganic Chemistry, Lomonosov Moscow University of Fine Chemical Technology, Moscow, Russian Federation
Laboratory of Analysis of Radioactive Materials, Frumkin Institute of Physical Chemistry and Electrochemistry, Moscow, Russian Federation
December 2, 2015