Table 2. Experimental details.

Crystal data
Chemical formula	C24H16N2O4
M r	396.39
Crystal system, space group	Monoclinic, P21/n
Temperature (K)	173
a, b, c (Å)	6.1500 (5), 4.7475 (3), 31.002 (2)
β (°)	90.461 (3)
V (Å3)	905.14 (11)
Z	2
Radiation type	Mo Kα
μ (mm−1)	0.10
Crystal size (mm)	0.50 × 0.06 × 0.02
Data collection
Diffractometer	Bruker APEXII CCD
Absorption correction	Multi-scan (SADABS; Bruker 2013 ▸)
T min, T max	0.661, 0.746
No. of measured, independent and observed [I > 2σ(I)] reflections	4593, 2016, 1444
R int	0.034
(sin θ/λ)max (Å−1)	0.650
Refinement
R[F 2 > 2σ(F 2)], wR(F 2), S	0.048, 0.119, 1.04
No. of reflections	2016
No. of parameters	136
H-atom treatment	H-atom parameters constrained
Δρmax, Δρmin (e Å−3)	0.25, −0.22

Computer programs: APEX2 and SAINT (Bruker, 2013 ▸), SHELXS97 and SHELXTL (Sheldrick 2008 ▸), SHELXL2014 (Sheldrick, 2015 ▸) and DIAMOND (Brandenburg, 2010 ▸).