Bruker SMART CCD area-detector diffractometer	6028 independent reflections
Radiation source: fine-focus sealed tube	3716 reflections with I > 2σ(I)
graphite	Rint = 0.049
φ and ω scans	θmax = 27.5°, θmin = 3.1°
Absorption correction: multi-scan (SADABS; Sheldrick, 1996)	h = −25→24
Tmin = 0.978, Tmax = 0.985	k = −8→8
21978 measured reflections	l = −26→26