Related Experiment Video
Updated: Apr 22, 2026

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
Published on: March 24, 2018
Xenon(II) polyfluoridotitanates(IV): synthesis and structural characterization of [Xe2F3]+ and [XeF]+ salts
Kristian Radan1, Evgeny Goreshnik, Boris Žemva
1Department of Inorganic Chemistry and Technology, "Jožef Stefan" Institute and Jožef Stefan International Postgraduate School, Jamova 39, 1000 Ljubljana (Slovenia). kristian.radan@ijs.si.
Abstract:
Thermal reaction between XeF2 and excess TiF4 resulted in the unexpected formation of a highly ionized Xe(II) species. The products [Xe2F3][Ti8F33] and [XeF]2[Ti9F38] represent the first examples of [Xe2F3](+) and [XeF](+) compounds, which differ from known Xe(II) salts containing discrete fluoride anions with pentavalent metalloid/metal centers. A new structural type of 2D polyanion [Ti8F33](-) and the formation and structure of the novel 1D [Ti9F38](2-) are discussed. Both products were characterized by single-crystal X-ray analysis and Raman spectroscopy.
Related Concept Videos
Crystal 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...
Ionic 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...
VSEPR Theory and the Effect of Lone Pairs
Electrophilic Aromatic Substitution: Fluorination and Iodination of Benzene
Predicting Molecular Geometry
Crown Ethers

