Bruker APEXII DUO CCD area-detector diffractometer	6956 independent reflections
Radiation source: fine-focus sealed tube	6490 reflections with I > 2σ(I)
graphite	Rint = 0.033
φ and ω scans	θmax = 34.0°, θmin = 1.9°
Absorption correction: multi-scan (SADABS; Bruker, 2009)	h = −17→17
Tmin = 0.953, Tmax = 0.987	k = −16→17
26247 measured reflections	l = −21→21