Bruker SMART APEXII CCD area-detector diffractometer	1153 independent reflections
Radiation source: fine-focus sealed tube	1116 reflections with I > 2σ(I)
graphite	Rint = 0.024
φ and ω scans	θmax = 37.5°, θmin = 3.7°
Absorption correction: multi-scan (SADABS; Bruker, 2005)	h = −21→22
Tmin = 0.939, Tmax = 0.981	k = −32→31
15454 measured reflections	l = −10→10