The next series we have studied is FA 6 W 2 H + . For FA 6 W 1 H + , the most stable structure is again a cyclic structure of E conformers with hydronium in the middle (nBE of -19.8 kcal/mol) followed by a cyclic structure of five E conformers, with additional E conformer external to the ring, here as well, the hydronium ion is found in the middle (nBE of - The nBE trends reported here are inline with experimental trends observed in the MS.