By a cationic Lewis acid is meant {HEAD ~ a cation} with {TAIL ~ a positive charge} such as Ag+, H+, and Na+ 
with
By a cationic Lewis acid is meant { HEAD ~ a cation } with { TAIL ~ a positive charge } such as Ag+ , H+ , and Na+
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH