Bruker SMART CCD area-detector diffractometer	4774 independent reflections
Radiation source: fine-focus sealed tube	3201 reflections with I > 2σ(I)
graphite	Rint = 0.041
φ and ω scans	θmax = 25.0°, θmin = 1.8°
Absorption correction: multi-scan (SADABS; Bruker, 1999)	h = −12→11
Tmin = 0.915, Tmax = 0.954	k = −13→13
11871 measured reflections	l = −23→26