Bruker APEXII CCD area detector diffractometer	2252 independent reflections
Radiation source: fine-focus sealed tube	2169 reflections with I > 2σ(I)
graphite	Rint = 0.040
φ and ω scans	θmax = 18.6°, θmin = 1.0°
Absorption correction: multi-scan (SADABS; Bruker, 2009)	h = −6→6
Tmin = 0.690, Tmax = 0.744	k = −8→8
9141 measured reflections	l = −19→19