Table 2. Experimental details.

Crystal data
Chemical formula	C8H14N2 2+·SO4 2−
M r	234.27
Crystal system, space group	Monoclinic, P21/c
Temperature (K)	150
a, b, c (Å)	12.841 (1), 6.0989 (5), 15.9642 (9)
β (°)	125.791 (4)
V (Å3)	1014.15 (13)
Z	4
Radiation type	Mo Kα
μ (mm−1)	0.32
Crystal size (mm)	0.56 × 0.44 × 0.30
Data collection
Diffractometer	Bruker APEXII
Absorption correction	Multi-scan (SADABS; Bruker, 2014 ▸)
T min, T max	0.735, 0.910
No. of measured, independent and observed [I > 2σ(I)] reflections	10992, 2293, 2131
R int	0.048
(sin θ/λ)max (Å−1)	0.649
Refinement
R[F 2 > 2σ(F 2)], wR(F 2), S	0.038, 0.114, 1.14
No. of reflections	2293
No. of parameters	160
H-atom treatment	H atoms treated by a mixture of independent and constrained refinement
Δρmax, Δρmin (e Å−3)	0.38, −0.61

Computer programs: APEX2 (Bruker, 2014 ▸) and SAINT (Bruker, 2014 ▸), XPREP (Sheldrick, 2015 ▸), SIR97 (Altomare et al., 1999 ▸), SHELXL2014/7 (Sheldrick, 2015 ▸) and ORTEP-3 for Windows and WinGX publication routines (Farrugia, 2012 ▸).