In this Communication, the incorrect G2 enthalpy data “−56.944771 (See Table S2 in Supporting Information)” of the NH4+ cation was used for the calculation of the heat of formation of the 2,2-dialkyltriazanium cation. The correct value is “−56.777599.” This mistake was caused by an error during input of “Charge” and “Multiplicity” for the G2 calculation of the NH4+ cation. The correct values are “Charge = 1; Multiplicity = 1”; however, in the original manuscript “Charge = 0; Multiplicity = 2” was used. As a result, the ΔHf, cation, ΔHf, P, vD, and Isp data for salts 1 to 7 in Table 1 as published are incorrect. The correct data are given here in Table 1. Salts d[b] Tm[c] Td[d] Ignition delay[e] Lattice energy[f] ΔHf[f] cation ΔHf[f] anion ΔHf[f] P[g] vD[h] Isp[i] IS[j] N2O4 WFNA 1[k] 1.47 – – 26 nh[l] 576.7 756.8 −230.3 −50.2 – – – >60 2 1.26 −0.19 145.7 8 16 501.2 756.8 −27.1 228.5 16.0 7169 226 >60 3 1.15 10.7 134.2 sh[m] 22[l] 506.5 756.8 113.4 363.7 12.1 6516 201 >60 4 1.48 – 134.2 nh[l] nh[l] 490.9 756.8 −127.7 138.2 21.2 7644 227 >60 5 1.35 47.8 142.5 nh[l] nh[l] 492.2 756.8 32.2 296.8 15.5 7009 211 >60 6 1.20 74.4 153.3 nh[l] nh[l] 491.7 756.8 200.3 465.4 11.1 6207 190 >60 7 1.47 99.0 145.6 10 4 544.5 756.8 −307.9 −95.6 22.2 8034 228 >60 IL A[n] 1.25 −61 – – 15 481.4 908.0 113.4 540 8.9 5721 186.7 – IL B[o] 1.41[p] −66 – – 31 525.8 895.6 113.4 483 16.2 7158 213.3 – The sentence “All of the 2,2-dimethyl triazanium salts have positive heats of formation with 6 the highest (905 kJ mol−1, Table 1)” on page 2794, left column, must be replaced with “Five 2,2-dimethyl triazanium salts have positive heats of formation with 6 the highest (465.4 kJ mol−1, Table 1).” All other results and conclusions of this Communication remain unaffected. The authors regret any confusion that may have arisen from the erroneous calculation.