Question

Which one of the following has the highest fugacity?

• A. Tosylate $\left(\stackrel{⊝}{O}Ts\right)$
• B. Mesylate
• C. Triflate $(F_{3}C-S{O}_3^{⊝})$
• D. All are equal

Answer 1

Answer: (C)

Triflate $(F_{3}C-S{O}_3^{⊝})$

It is the conjugate base (weak base) of the strongest acid $(F_{3}C-S{O}_{3}H)$.