Bruker SMART area-detector diffractometer	1796 independent reflections
Radiation source: fine-focus sealed tube	1356 reflections with I > 2σ(I)
graphite	Rint = 0.042
φ and ω scans	θmax = 25.7°, θmin = 2.3°
Absorption correction: multi-scan (SADABS; Sheldrick, 1996)	h = −18→18
Tmin = 0.918, Tmax = 0.979	k = −4→4
6484 measured reflections	l = −20→20