Bruker Kappa APEXII CCD diffractometer	4926 independent reflections
Radiation source: fine-focus sealed tube	3390 reflections with I > 2σ(I)
graphite	Rint = 0.026
ω scans	θmax = 30.7°, θmin = 2.1°
Absorption correction: multi-scan (SADABS; Sheldrick, 1996)	h = −14→13
Tmin = 0.928, Tmax = 0.952	k = −13→12
20534 measured reflections	l = −25→25