Table 5. Percentage contribution of the different inter­molecular inter­actions to the Hirshfeld surfaces for the dication, anion and salt.

Contact	Dication	Anion	Salt
O⋯H/H⋯O	41.6	47.2	43.2
H⋯H	25.1	16.7	23.7
C⋯H/H⋯C	20.2	17.4	17.3
C⋯O/O⋯C	6.6	12.8	10.2
N⋯H/H⋯N	2.3	0.3	1.1
C⋯C	0.2	3.0	2.2
O⋯O	1.2	2.0	1.0
N⋯O/O⋯N	2.3	0.1	1.2
N⋯C/C⋯N	0.5	0.5	0.1