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Vibrational predissociation spectra of the H3O+ ion in several tricoordinated environments including (A) Ar3, (C) (N2)3 (reproduced from ref. 8), (E) (TMA)3 (TMA, trimethylammonium; reproduced from ref. 13), and (F) (H2O)3 (reproduced from ref. 9). Harmonic predictions [B3LYP/6-311++G(2d,2p) scaled by 0.99556 below 2,700 cm−1 and by 0.95732 above 2,700 cm−1] are included as inverted traces for (B) Ar3, (D) (N2)3, and (G) (H2O)3.
