Bruker APEXII area-detector diffractometer	3927 independent reflections
Radiation source: fine-focus sealed tube	3106 reflections with I > 2σ(I)
graphite	Rint = 0.028
ω scans	θmax = 27.7°, θmin = 2.3°
Absorption correction: multi-scan (SADABS; Sheldrick, 1996)	h = −12→12
Tmin = 0.935, Tmax = 0.978	k = −13→13
24834 measured reflections	l = −23→23