Triethyloxonium tetrafluoroborate, (CH3CH2)3O+ BF4-, is a solid with melting point 91-92 C. Show how this reagent can

Question:

Triethyloxonium tetrafluoroborate, (CH3CH2)3O+ BF4-, is a solid with melting point 91-92 °C. Show how this reagent can transfer an ethyl group to a nucleophile (Nuc:-) in an SN2 reaction. What is the leaving group? Why might this reagent be preferred to an ethyl halide? (Consult Table 6-2.)