salts of fluoroanions of aluminum , gallium , and indium are described . the fluoroanions have the formula . sup .⊖ wherein e is aluminum , gallium , or indium , wherein f is fluorine , and wherein r &# 39 ;, r &# 34 ;, and r &# 39 ;&# 34 ; is each a fluorinated phenyl , fluorinated biphenyl , or fluorinated polycyclic group .