| abstract |
(57) [Problem] To provide a novel compound which can be used as a highly active acid catalyst. A metal salt of tris (perfluoroalkylsulfonyl) methide represented by the following formula: [(RfSO 2 ) 3 C] n M n (where Rf is a perfluoroalkyl group having 1 or more carbon atoms, M 1 is a transition metal containing rare earth, cadmium, gallium, indium, thallium, silicon, germanium, tin, (Indicates an element selected from lead, arsenic, antimony, bismuth, selenium, and tellurium. N represents an integer equal to the valence of M 1. ) |