Bruker KAPPA APEX II CCD diffractometer	3583 independent reflections
Radiation source: fine-focus sealed tube	2930 reflections with I > 2σ(I)
graphite	Rint = 0.028
φ and ω scans	θmax = 28.4°, θmin = 3.4°
Absorption correction: multi-scan (SADABS;Bruker, 2007)	h = −8→8
Tmin = 0.886, Tmax = 0.949	k = −14→14
13205 measured reflections	l = −15→15