Bruker SMART APEXII DUO CCD diffractometer	6698 independent reflections
Radiation source: fine-focus sealed tube	5270 reflections with I > 2σ(I)
graphite	Rint = 0.033
φ and ω scans	θmax = 35.3°, θmin = 1.6°
Absorption correction: multi-scan (SADABS; Bruker, 2009)	h = −7→7
Tmin = 0.857, Tmax = 0.959	k = −27→34
25117 measured reflections	l = −25→22