Electron-transfer reactivity in the activation of organic fluorides by bare metal monocations
摘要:
In the gas phase, the bare calcium monocation reacts with organic fluorides, via C-F bond activation to yield CaF+ together with the corresponding radical. Ab initio calculations are used to analyse the mechanism of reaction with fluoromethane, Density-functional calculations lead to underestimated reaction barriers, whereas ACPF and CCSD(T) calculations with large basis sets provide good agreement with experiment. The reaction involves a tightly bonded TS in which an electron is transferred from calcium to carbon; this structured harpoon mechanism highlights the simultaneous importance of electron transfer and of metal-fluorine bonding in reductive defluorination processes. (C) 1997 Elsevier Science B,V.
Electronic branching in reactions of calcium (3P,1D) and magnesium(3P) with fluorine, chlorine, and bromine: experiments and global model
作者:Andrzej. Kowalski、Michael. Menzinger
DOI:10.1021/j100368a034
日期:1990.3
Electron-transfer reactivity in the activation of organic fluorides by bare metal monocations
作者:Jeremy N. Harvey、Detlef Schröder、Wolfram Koch、David Danovich、Sason Shaik、Helmut Schwarz
DOI:10.1016/s0009-2614(97)00560-5
日期:1997.7
In the gas phase, the bare calcium monocation reacts with organic fluorides, via C-F bond activation to yield CaF+ together with the corresponding radical. Ab initio calculations are used to analyse the mechanism of reaction with fluoromethane, Density-functional calculations lead to underestimated reaction barriers, whereas ACPF and CCSD(T) calculations with large basis sets provide good agreement with experiment. The reaction involves a tightly bonded TS in which an electron is transferred from calcium to carbon; this structured harpoon mechanism highlights the simultaneous importance of electron transfer and of metal-fluorine bonding in reductive defluorination processes. (C) 1997 Elsevier Science B,V.