Bruker APEX CCD diffractometer	1041 independent reflections
Radiation source: fine-focus sealed tube	923 reflections with I > 2σ(I)
graphite	Rint = 0.037
φ and ω scans	θmax = 26.0°, θmin = 2.9°
Absorption correction: multi-scan (SADABS; Bruker, 2002)	h = −17→17
Tmin = 0.974, Tmax = 0.991	k = −8→8
7345 measured reflections	l = −12→13