Jul. 30, 2020  82  US 2020/0241418 Al  [0117]  In formula (IA),  wa  is fluorine or a Cl-C40 mon› ovalent hydrocarbon group which may contain a heteroa› tom. The monovalent hydrocarbon group may be straight,  branched or cyclic and examples thereof are as will be  exemplified below for R  107 .  [0118]  Of the anions of formula (IA), a structure having  formula (IA’) is preferred.  [0119]  In formula (IA’), R$^{106 }$is hydrogen or trifluorom› ethyl, preferably trifluoromethyl.  [0120]  R $^{107 }$is a C$_{1 }$-C$_{38 }$ monovalent hydrocarbon group  which may contain a heteroatom. Suitable heteroatoms  include oxygen, nitrogen, sulfur and halogen, with oxygen  being preferred. Of the monovalent hydrocarbon groups,  [0116]  In formulae  (1-1)  and (1-2), x- is an anion selected  from the formulae (IA) to (ID).  (3A)  (3B)  (3C)  0  CF3  Rfd  -M-o-6-cH3-So3- I  CF3  (3D)  -continued  Q  1+  -continued  Br  F  (fee,  1110,  I#  1110,  I#  /0  /0  $^{c,}$17c,  "Y’  I  #  N02  lvo,  I#  I#  /0  /0  Q  Q  1110,  r+  V  I#  /0  Q  Q  1+  1+ 