Mobilities and interaction potentials for K+–Ar, K+–Kr, and K+–Xe

Abstract

Mobilities for K+ ions in Ar, Kr, and Xe gases have been measured at 300 °K in a drift tube spectrometer over a wide range of E/N (the ratio of the electric field intensity to the neutral gas number density). New data for K+–Kr and K+–Xe are presented here. The Viehland–Mason kinetic theory of ionic mobility, being valid for arbitrary E/N, is employed to calculate theoretical mobilities by utilizing electron gas–Drude model potentials of Gordon and Waldman for K+–Ar, K+–Kr, and K+–Xe. The results of these calculations are compared with the experimental data. Using the Gordon and Waldman potentials as a starting point, an iterative scheme, employing the experimental data directly, is used to develop ’’experimental’’ potentials. The new potentials are tabulated and compared to the Gordon and Waldman potentials.

Cationic Noncovalent Interactions: Energetics and Periodic Trends

“…Table lists BDEs for interaction between various metal cations and the rare gases (Rg). Most of these data were acquired using mobility − ,− or scattering ,− techniques. Among these data, Takebe has reported well depths for most of the alkali cation–rare gas interactions, but in many cases, these values are considerably higher than those obtained from alternate sources.…”

“…Multiple references refer to the average from all listed references. E = single temperature equilibrium, H = high-pressure temperature-dependent equilibrium, M = mobility, − ,− P = photodissociation and ionization, , S = scattering, ,, and T = threshold of endothermic reaction. − b Average of values from multiple experiments listed in ref . c Corresponds to an excited electronic state of Ni + . d Relative free energy ( E ) anchored to D (Fe + –CH 4 ) from ref and adjusted to 0 K in ref . …”

“…Multiple references refer to the average from all listed references. E = single temperature equilibrium, H = high-pressure temperature-dependent equilibrium, M = mobility, − ,− P = photodissociation and ionization, , S = scattering, ,, and T = threshold of endothermic reaction. − …”