Metastable behavior of noble gas inserted tin and lead fluorides
Literature Information
Sudip Pan, Ashutosh Gupta, Subhajit Mandal, Diego Moreno, Gabriel Merino, Pratim K. Chattaraj
Ab initio computations are carried out to explore the structure and stability of FNgEF3 and FNgEF (E = Sn, Pb; Ng = Kr–Rn) compounds. They are the first reported systems to possess Ng–Sn and Ng–Pb bonds. Except for FKrEF3, the dissociations of FNgSnF3 and FNgEF, producing Ng and SnF4 or EF2, are only exergonic in nature at room temperature, whereas FNgPbF3 has a thermochemical instability with respect to two two-body dissociation channels. However, they are kinetically stable, having positive activation barriers (ranging from 2.2 to 49.9 kcal mol−1) with respect to those dissociations. The kinetic stability gradually improves in moving from the Kr to Rn analogues. The remaining possible dissociation channels for these compounds are found to be endergonic in nature. The nature of the bonding is analyzed by natural bond order, electron density, and energy decomposition analyses. Particularly, the natural population analysis reveals that they are best represented as F−(NgEF3)+ and F−(NgEF)+. All the Xe/Rn–E bonds in FNgEF3 and FNgEF are covalent in nature.
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