Bruker SMART APEX diffractometer	2128 independent reflections
Radiation source: fine-focus sealed tube	1925 reflections with I > 2σ(I)
graphite	Rint = 0.034
ω scans	θmax = 27.5°, θmin = 2.4°
Absorption correction: multi-scan (SADABS; Sheldrick, 1996)	h = −23→22
Tmin = 0.973, Tmax = 0.991	k = −6→6
4390 measured reflections	l = −15→15