Bruker SMART CCD area-detector diffractometer	3939 independent reflections
Radiation source: fine-focus sealed tube	3611 reflections with I > 2σ(I)
graphite	Rint = 0.020
Detector resolution: 81.92 pixels mm-1	θmax = 28.3°, θmin = 2.6°
φ scans	h = −17→17
Absorption correction: multi-scan (SADABS; Sheldrick, 1997)	k = −11→11
Tmin = 0.460, Tmax = 0.656	l = −20→21
13671 measured reflections