supported by the National Research School Combination-Catalysis (NRSC-C);the Netherlands Organization for Scientific Research (NWO-CW and NWO-NCF)
Halide anions X-are known to show a decreasing proton affinity(PA),as X descends in the periodic table along series F,Cl,Br and I.But it is also well-known that,along this series,the halogen atom X becomes less electr...