Patent ID: 8580486

Claim:
A compound that is an acid or a salt and has a fluorine-containing carbanion structure represented by the following general formula (1), wherein n represents an integer of 1-3; R′ represents a C 1-3 substituted or unsubstituted alkyl group; R represents a C 1-10 straight-chain or branched alkyl group, a C 1-10 straight-chain or branched alkenyl group having a polymerizable double bond at an end portion at least, a C 3-20 alicyclic organic group, an organic group formed of a C 3-20 alicyclic organic group and a straight-chain alkylene group, a C 3-30 monocyclic or polycyclic lactone, or a C 6-20 aryl group; in R, hydrogen atoms on the alkyl group, the alkenyl group, the alicyclic organic group, the organic group formed of the alicyclic organic group and the straight-chain alkylene group, the monocyclic or polycyclic lactone, and the aryl group may partially or entirely be replaced with fluorine, hydroxyl group, hydroxycarbonyl group, or C 1-6 straight-chain, branched or cyclic alkoxy group; in R, two hydrogen atoms on the same carbon constituting the alkyl group, the alkenyl group, the alicyclic organic group, or the organic group formed of the alicyclic organic group and the straight-chain alkylene group may be replaced with a single oxygen atom to make a keto group; in R, one of the hydrogen atoms on the alkyl group may be replaced with 2-acryloyloxy group or 2-methacryloyloxy group; A represents any one of four groups represented by the following formula, and each of R F and R F ′ independently represents a C 1-4 perfluoroalkyl group.