Bruker APEXII DUO CCD area-detector diffractometer	6191 independent reflections
Radiation source: fine-focus sealed tube	4889 reflections with I > 2σ(I)
graphite	Rint = 0.033
φ and ω scans	θmax = 30.0°, θmin = 1.6°
Absorption correction: multi-scan (SADABS; Bruker, 2009)	h = −8→8
Tmin = 0.935, Tmax = 0.975	k = −31→30
22989 measured reflections	l = −21→21