Anchimeric assistance by γ-aryl groups in solvolysis of organosilicon iodides. Some remarkably large remote substituent effects
作者:Colin Eaborn、Karen L. Jones、Paul D. Lickiss
DOI:10.1039/c39890000595
日期:——
The very large spread of rates in reactions of the iodides (Me3Si)2C(SiMe2C6H4X)(SiMe2l)(X =p-OMe, p-Me, H, p-Cl, or m-CF3) with (CF3)2CHOH and CF3CH2OH (the compound with X =p-OMe is 1.9 × 105 and 6.5 × 104 times, respectively, as reactive as that with X =m-CF3) is attributed to nucleophilic assistance by the aryl group to the leaving of the I– ion.
碘化物(Me 3 Si)2 C(SiMe 2 C 6 H 4 X)(SiMe 2 l)(X = p -OMe,p -Me,H,p -Cl或米-CF 3)和(CF 3)2 CHOH和CF 3 CH 2 OH(在与X =化合物p -OMe是1.9×10 5和6.5×10 4倍,分别作为作为与X =反应米- CF 3)由芳基归因于亲核援助到I的离去-离子。