Related Experiment Video
Updated: Jul 12, 2026

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
Published on: March 24, 2018
Antiprismatic Coordination about Xenon: The Structure of Nitrosonium Octafluoroxenate(VI)
Abstract:
The structure of nitrosonium octafluoroxenate(VI), 2NOF . XeF(6), has been determined by means of single-crystal x-ray counter methods (R-index = 0.046, weighted R-index = 0.042). The space group is Pnma, with a = 8.914(10) angstroms, b = 5.945(10) angstroms, and c = 12.83(2) angstroms (the numbers in parentheses are the standard deviations to the least significant digit or digits); the calculated density (rho) is 3.354 grams per cubic centimeter, and there are four formula units per unit cell. The material consists of well-separated NO(+) and (XeF(8))(2-) ions; the structural formula is thus (NO)(2) (XeF(8)). The anion configuration is that of a slightly distorted Archimedean antiprism. The observed distortion appears incompatible with a lone-pair repulsion model. Xenon-fluorine bond lengths of 1.971(7), 1.946(5), 1.958(7), 2.052(5), and 2.099(5) angstroms were found.
More Related Videos
Related Concept Videos
Valence Bond Theory
Valence Bond Theory
Coordination Number and Geometry
Coordination Compounds and Nomenclature
VSEPR Theory and the Effect of Lone Pairs
Lewis Structures of Molecular Compounds and Polyatomic Ions

