By a neutral Lewis acid is meant a compound which is {TAIL ~ a Lewis acid} capable for abstracting {HEAD ~ X} from to form a weakly coordinating anion 
By a neutral Lewis acid is meant a compound which is { TAIL ~ a Lewis acid } capable for abstracting { HEAD ~ X } from to form a weakly coordinating anion
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH