Bruker SMART APEXII DUO CCD area-detector diffractometer	4454 independent reflections
Radiation source: fine-focus sealed tube	4347 reflections with I > 2σ(I)
graphite	Rint = 0.105
φ and ω scans	θmax = 30.1°, θmin = 2.1°
Absorption correction: multi-scan (SADABS; Bruker, 2009)	h = −15→15
Tmin = 0.980, Tmax = 0.991	k = −13→15
27808 measured reflections	l = −51→38