Bruker SMART CCD area-detector diffractometer	3928 independent reflections
Radiation source: fine-focus sealed tube	2994 reflections with I > 2σ(I)
graphite	Rint = 0.038
ω scans	θmax = 27.0°, θmin = 1.6°
Absorption correction: multi-scan (SADABS; Sheldrick, 1996)	h = −9→9
Tmin = 0.217, Tmax = 0.231	k = −30→31
12877 measured reflections	l = −12→12