Related Experiment Video
Updated: Sep 6, 2026
Comparison of Two Different Synthesis Methods of Single Crystals of Superconducting Uranium Ditelluride
Published on: July 8, 2021
Uranyl derivatives: discovering features by comparing related crystal structures
Pavel A Pirozhkov1, Maria V Yusupova1, Anna V Vologzhanina1,2
1Samara National Research University, Samara 443086, 34 Moskovskoye shosse, Russian Federation.
Abstract:
Three new complexes, namely, hydronium μ-hydroxido-μ-isobutyrato-bis[diaquaberyllium(II)] tris[triisobutyratodioxidouranium(VI)] dihydrate, (H3O)[Be2(C4H7O2)(OH)(H2O)4][U(C4H7O2)3O2]3·2H2O or (H3O)[Be2(μ-OH)(μ-i-but)(H2O)4][UO2(i-but)3]3·2H2O (I) [i-but denotes the isobutyrate ion CH3CH(CH3)COO-], poly[tri-μ4-isobutyrato-di-μ-oxido-rubidium(I)uranium(VI)], [RbU(C4H7O2)3O2]n or Rb[UO2(i-but)3] (II), and poly[pentaaquatetracosa-μ-crotonato-hexadeca-μ-oxido-tetrabarium(II)octauranium(VI)], [Ba4U8(C4H5O2)24O16(H2O)5]n or Ba4[UO2(crt)3]7[UO2(crt)3(H2O)](H2O)4 (III) (crt denotes the crotonate ion, C3H5COO-), were synthesized and their crystal structures were determined. In order to achieve general conclusions, a comparison of the new crystal structures with previously published structures was conducted. Complex I is the first compound containing a hydronium ion and Be atoms in an oxygen environment simultaneously. It was revealed that the new Rb isobutyratouranylate, II, features the same packing motif as in the butyrate-, crotonate- and methacrylate-containing analogues. Using the example of the Rb series of compounds, we evaluated the compliance of the sizes of the structural fragments based upon the change of their crystal system. It was shown that the packing motif of III strongly depends on the ratio of the reagents.
More Related Videos
06:18Syntheses, Crystallization, and Spectroscopic Characterization of 3,5-Lutidine N-Oxide Dehydrate
Published on: April 24, 2018
07:20Discovery and Synthesis Optimization of Isoreticular Al(III) Phosphonate-Based Metal-Organic Framework Compounds Using High-Throughput Methods
Published on: October 6, 2023
Related Concept Videos
01:29Determination of Crystal Structures
02:58Crystal Field Theory - Octahedral Complexes
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
01:18Unit Cells
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
02:18X-ray Crystallography
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...
02:42Ionic Crystal Structures
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...