Oxford Diffraction Xcalibur diffractometer with a Sapphire CCD detector	2805 independent reflections
Radiation source: fine-focus sealed tube	1356 reflections with I > 2σ(I)
graphite	Rint = 0.058
Rotation method data acquisition using ω scans	θmax = 25.4°, θmin = 2.9°
Absorption correction: multi-scan (CrysAlis RED; Oxford Diffraction, 2009)	h = −18→15
Tmin = 0.962, Tmax = 0.993	k = −5→4
5068 measured reflections	l = −25→21