Bruker SMART 1000 CCD diffractometer	2768 independent reflections
Radiation source: fine-focus sealed tube	1787 reflections with I > 2σ(I)
graphite	Rint = 0.028
ω scans	θmax = 27.0°, θmin = 2.2°
Absorption correction: multi-scan (SADABS; Bruker, 2001)	h = −11→12
Tmin = 0.986, Tmax = 0.989	k = −11→10
6579 measured reflections	l = −18→16