Finally, it is important to note that the positive charge in these systems is not localised in a single atom but is shared amongst multiple atoms. This shared positive charge results in an increased positive character (+0.1 e higher) of the hydrogen atom (NH) when the NH transitions from a neutral to a cationic structure. Consequently, the establishment of hydrogen bonds with the different anions under study is inarguably strengthened and favoured because of the increased positive charge exhibited by the hydrogen (H) atom involved.