Oxford Diffraction Excalibur2 CCD diffractometer	2294 independent reflections
Radiation source: fine-focus sealed tube	1988 reflections with I > 2σ(I)
graphite	Rint = 0.016
ω scans	θmax = 31.9°, θmin = 4.0°
Absorption correction: multi-scan (Blessing, 1995)	h = −13→13
Tmin = 0.909, Tmax = 0.963	k = −15→16
12604 measured reflections	l = −16→17