Bruker SMART APEXII DUO CCD area-detector diffractometer	1784 independent reflections
Radiation source: fine-focus sealed tube	1506 reflections with I > 2σ(I)
graphite	Rint = 0.032
φ and ω scans	θmax = 26.5°, θmin = 2.1°
Absorption correction: multi-scan (SADABS; Bruker, 2009)	h = −8→8
Tmin = 0.942, Tmax = 0.984	k = −8→8
6312 measured reflections	l = −12→12