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(Left) Snapshot structures taken from the BOMD simulations for the reaction of HMSA with NH3 and methylamine (CH3NH2), which illustrate the formation of MSA−⋅⋅NH4+ (A) and MSA−⋅⋅CH3NH3+ (B) ion pairs on the water droplet. (Right) Time evolution of key bond distances O1-H1, O2-H1, and H1-N1 involved in the ion pair-forming reactions.
