F?(H2O)+CH3I Ligand Exchange Reaction Dynamics

作     者：Bjorn Bastian Tim Michaelsen Milan Oncák Jennifer Meyer Roland Wester Bjorn Bastian;Tim Michaelsen;Milan Oncák;Jennifer Meyer;Roland Wester

作者机构：Institut für Ionenphysik und Angewandte PhysikUniversitat InnsbruckTechnikerstraβe 256020 InnsbruckAustria 

出 版 物：《Chinese Journal of Chemical Physics》 (化学物理学报（英文）)

年 卷 期：2020年第33卷第2期

页      面：210-216,I0003,I0039-I0040页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：support by a Hertha-Firnberg fellowship of the Austrian Science Fund (T962-N34) 

主　　题：Reaction dynamics Ligand exchange Microsolvation Crossed beams Velocity map imaging 

摘      要：Single hydration of the gas phase F^-+CH3I→CH3F reaction allows to probe solvent effects on a fundamental nucleophilic substitution *** the same time,the addition of a solvent molecule opens alternative product ***,we present crossed beam imaging results on the dynamics of the F^-(H2O)+CH3I→[FCH3I]^-+H2O ligand exchange pathway at collision energies between 0.3 and 2.6 *** kinetic energies are constrained by the stability requirement of the weakly bound product *** implies substantial internal excitation of the water molecule and disfavors effcient energy redistribution in an intermediate complex,which is reflected by the suppression of low kinetic energies as collision energy *** 0.3 eV,internal nucleophilic displacement is important and is discussed in light of the competing nucleophilic substitution pathways that form I^- and I^-(H2O).