| abstract |
The present invention relates to salts of formula (X). X In formula (X) above, Q 1 and Q 2 are each independently a fluorine atom or a C 1 -C 6 perfluoroalkyl group, L 1 and L 2 are each independently a C 1 -C 17 divalent saturated hydrocarbon group wherein one or more -CH 2 - may be replaced by -O- or -CO-, Ring W < 1 > is a C3-C36 saturated hydrocarbon ring, R 5 are each independently a C 1 -C 6 alkyl group or a C 1 -C 6 alkoxy group, w is an integer of 0 to 2, v is 1 or 2, Z + is an organic counterion, W 10 is a group of the formula X-1 or a group of the formula X-2. X-1 In the above formula (X-1) Ring W < 2 > is a C3-C36 saturated hydrocarbon ring, R < 1 > is a C1-C12 hydrocarbon group, R 2 are each independently a C 1 -C 6 alkyl group or a C 1 -C 6 alkoxy group, s is an integer of 0 to 2; X-2 In the above formula (X-2) Ring W < 3 > is a C4-C36 lactone ring, R 3 are each independently a C 1 -C 6 alkyl group, a C 1 -C 6 alkoxy group or a C 2 -C 7 alkoxycarbonyl group, and t is an integer of 0 to 2. |