Air-stable zirconocene bis(perfluoroctanesulfonate)s [Cp 2 Zr]OSO 2 C 8 F 17 ) 2 ] (1) with high Lewis acidity and high thermal stability was prepared by the reaction between Cp 2 ZrCl 2 and AgOSO 2 C 8 F 17 . The as-prepared complex 1 exhibits good activity and selectivity in the cyclotrimerization of various ketones to the desired 1,3,5-triaylbenzenes. Furthermore, in the cyclic experiments, the complex 1 shows little loss of activity after 10 cycles. The results afford a ...