Bruker Kappa APEXII CCD area-detector diffractometer	3368 independent reflections
Radiation source: fine-focus sealed tube	2899 reflections with I > 2σ(I)
graphite	Rint = 0.029
φ and ω scans	θmax = 28.4°, θmin = 2.2°
Absorption correction: multi-scan (SADABS; Bruker, 2005)	h = −10→10
Tmin = 0.306, Tmax = 0.436	k = −24→21
12686 measured reflections	l = −12→13