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[0128] In formula (IB), R11’ 1 and R11’ 2 are each indepen› dently fluorine or a C$_{1 }$-C$_{40 }$monovalent hydrocarbon group which may contain a heteroatom. The monovalent hydro› carbon group may be straight, branched or cyclic, and examples thereof are as exemplified above for R 107 . Pref› erably R11’ $^{1 }$and R11’ $^{2 }$are fluorine or C$_{1 }$-C$_{4 }$ straight fluorinated alkyl groups. Also, R11’ $^{1 }$and R11’ $^{2 }$may bond together to form a ring with the linkage: --CF 2 -S0 2 -N-S0 2 -CF 2 - to which they are attached. It is preferred that a combination of R11’ 1 and R11’ 2 be a fluorinated ethylene or fluorinated pro› pylene group. 

[0129] In formula (IC), W’cl, Wc 2 and Wc3 are each inde› pendently fluorine or a C$_{1 }$-C$_{40 }$ monovalent hydrocarbon group which may contain a heteroatom. The monovalent hydrocarbon group may be straight, branched or cyclic, and examples thereof are as exemplified above for R 107 . Pref› erably wc1, wc 2 and wc3 are fluorine or cl -C4 straight fluorinated alkyl groups. Also, wc1 and Wc 2 may bond together to form a ring with the linkage: -CF$_{2}$-S0$_{2}$ - C-S02----CF 2 - to which they are attached. It is preferred that a combination ofWc1 and wc $^{2 }$be a fluorinated ethylene or fluorinated propylene group. 

[0130] In formula (ID), wd is a Cl-C40 monovalent hydro› carbon group which may contain a heteroatom. The mon› ovalent hydrocarbon group may be straight, branched or cyclic, and examples thereof are as exemplified above for R107_ 

