Bruker SMART APEXII CCD area-detector diffractometer	4061 independent reflections
Radiation source: fine-focus sealed tube	3279 reflections with I > 2σ(I)
graphite	Rint = 0.030
φ and ω scans	θmax = 27.5°, θmin = 1.7°
Absorption correction: multi-scan (SADABS; Bruker, 2009)	h = −8→8
Tmin = 0.937, Tmax = 0.987	k = −14→12
17014 measured reflections	l = −15→15