Bruker APEXII CCD area-detector diffractometer	7407 independent reflections
Radiation source: fine-focus sealed tube	5476 reflections with I > 2σ(I)
graphite	Rint = 0.064
φ and ω scans	θmax = 26.0°, θmin = 2.2°
Absorption correction: multi-scan (SADABS; Sheldrick, 2003)	h = −13→13
Tmin = 0.903, Tmax = 0.924	k = −22→22
42911 measured reflections	l = −23→23