Bruker APEXII DUO CCD diffractometer	2190 independent reflections
Radiation source: fine-focus sealed tube	1895 reflections with I > 2σ(I)
graphite	Rint = 0.029
φ and ω scans	θmax = 32.1°, θmin = 2.2°
Absorption correction: multi-scan (SADABS; Bruker, 2009)	h = −5→5
Tmin = 0.841, Tmax = 0.986	k = −20→20
6112 measured reflections	l = −18→18