Bruker SMART APEX CCD area-detector diffractometer	4174 independent reflections
Radiation source: fine-focus sealed tube	2506 reflections with I > 2σ(I)
graphite	Rint = 0.058
φ and ω scans	θmax = 25.0°, θmin = 2.1°
Absorption correction: multi-scan (SADABS; Sheldrick, 1996)	h = −8→8
Tmin = 0.693, Tmax = 0.815	k = −39→27
12151 measured reflections	l = −12→10