Bruker SMART APEXII CCD diffractometer	11591 independent reflections
Radiation source: fine-focus sealed tube	9231 reflections with I > 2σ(I)
graphite	Rint = 0.036
φ and ω scans	θmax = 34.0°, θmin = 1.7°
Absorption correction: multi-scan (SADABS; Bruker, 2009)	h = −13→16
Tmin = 0.943, Tmax = 0.975	k = −18→18
39492 measured reflections	l = −19→19