Bruker APEXII CCD diffractometer	2471 reflections with I > 2σ(I)
φ and ω scans	Rint = 0.073
Absorption correction: multi-scan (SADABS; Bruker, 2003)	θmax = 27.0°, θmin = 2.1°
Tmin = 0.660, Tmax = 0.746	h = −13→13
23764 measured reflections	k = −12→12
4102 independent reflections	l = −24→24