A kinetic study of proton transfer reactions of NH+4, CH3NH+3, and PH+4 with calcium atoms |
| |
Authors: | Luis Alejandro Eslava Richard F Porter |
| |
Institution: | Department of Chemistry, Cornell University, Ithaca, New York 14853, USA |
| |
Abstract: | Cross section measurements for the proton transfer reactions of NH+4, CH3NH+3, and PH+4 with Ca(g) have been obtained over a range of low ion kinetic energies. For all reactions studied the cross sections drop sharply with increase in ion kinetic energy, indicating exothermic behavior. The results show that Ca(g) is an unusually strong base with a proton affinity in excess of 9.2 eV. Cross sections for the PH+4Ca reaction are an order to magnitude higher than those for the NH+4Ca reaction for ion energies between one and three eV. This effect is not explained by simple theories of ion-induced dipole interactions. It is suggested that the enhanced rate of the PH+4Ca reaction may be due to d-orbital participation. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|