Table 2. Experimental details.

Crystal data
Chemical formula	C16H12N4O2
M r	292.30
Crystal system, space group	Tetragonal, I41/a
Temperature (K)	300
a, c (Å)	20.721 (5), 12.835 (3)
V (Å3)	5511 (3)
Z	16
Radiation type	Mo Kα
μ (mm−1)	0.10
Crystal size (mm)	0.33 × 0.13 × 0.12
Data collection
Diffractometer	Bruker APEXII CCD
Absorption correction	Multi-scan (SADABS; Krause et al., 2015 ▸)
Tmin, Tmax	0.968, 0.988
No. of measured, independent and observed [I > 2σ(I)] reflections	40086, 3416, 2231
R int	0.044
(sin θ/λ)max (Å−1)	0.666
Refinement
R[F2 > 2σ(F2)], wR(F2), S	0.048, 0.166, 1.17
No. of reflections	3416
No. of parameters	200
H-atom treatment	H-atom parameters constrained
Δρmax, Δρmin (e Å−3)	0.18, −0.19

Computer programs: APEX3 (Bruker, 2017 ▸), SAINT (Bruker, 2017 ▸), SHELXT (Sheldrick, 2015a ▸), ORTEP-3 for Windows (Farrugia, 2012 ▸), SHELXL (Sheldrick, 2015b ▸) and PLATON (Spek, 2020 ▸).