Bruker APEXII CCD diffractometer	4252 independent reflections
Radiation source: fine-focus sealed tube	2225 reflections with I > 2σ(I)
graphite	Rint = 0.065
φ and ω scans	θmax = 26.5°, θmin = 2.0°
Absorption correction: multi-scan (SADABS; Bruker, 2001)	h = −11→11
Tmin = 0.983, Tmax = 0.987	k = −13→12
8475 measured reflections	l = −13→13