| abstract |
The salt represented by the formula (I) Formula I In the formula (I) Q 1 and Q 2 are each independently a fluorine atom or a C 1 -C 6 perfluoroalkyl group, L 1 is a C 1 -C 17 divalent saturated hydrocarbon group wherein the methylene group may be replaced by an oxygen atom or a carbonyl group, L 2 and L 3 are each a single bond or a C 1 -C 6 divalent saturated alkyl group wherein the methylene group may be replaced by an oxygen atom or a carbonyl group, The rings W 1 and W 2 are each a C 3 -C 36 hydrocarbon ring, R 1 and R 2 are each a hydrogen atom or a C 1 -C 6 alkyl group, R 3 is a C 1 -C 6 alkyl group, t is an integer of 0 to 2, Z + is an organic counterion. |