Bruker SMART APEXII CCD diffractometer	5291 independent reflections
Radiation source: sealed tube	4023 reflections with I > 2σ(I)
Detector resolution: 8.333 pixels mm-1	Rint = 0.041
φ and ω scans	θmax = 31.1°, θmin = 2.7°
Absorption correction: multi-scan (SADABS; Sheldrick, 2008)	h = −21→21
Tmin = 0.885, Tmax = 0.975	k = −12→12
21434 measured reflections	l = −18→18