Bruker SMART APEXII CCD area-detector diffractometer	4437 independent reflections
Radiation source: fine-focus sealed tube	2266 reflections with I > 2s(I)
graphite	Rint = 0.065
φ and ω scans	θmax = 27.5°, θmin = 1.9°
Absorption correction: multi-scan (SADABS; Bruker, 2009)	h = −13→13
Tmin = 0.968, Tmax = 0.994	k = −15→15
19216 measured reflections	l = −19→19