Bruker Kappa APEXII CCD diffractometer	4226 independent reflections
Radiation source: fine-focus sealed tube	3259 reflections with I > 2σ(I)
graphite	Rint = 0.025
ω scans	θmax = 30.2°, θmin = 1.7°
Absorption correction: multi-scan (SADABS; Sheldrick, 1996)	h = −6→11
Tmin = 0.978, Tmax = 0.982	k = −11→12
19570 measured reflections	l = −17→17