“…[15][16][17][18][19] In addition, other authors have reported computational studies on the stability of other complexes formed, thanks to hydrogen-bonding interactions. [20][21][22][23] From the experimental point of view, the detection of these cation-cation and anion-anion complexes in the gas phase has remained elusive, unless they are stabilized by receptors that can accommodate such dimeric species through noncovalent interactions, as reported for sulfamic acid clusters, 24 bisulphate dimers, 25 organophosphate dimers, 26 phosphate dimers 27 and oligomers, 28,29 and pyrophosphate dimers. 28 Very recently, halogen bonding interactions have also been the subject of theoretical studies of ion like-charge interactions in both dianionic [30][31][32] and dicationic complexes.…”