Nonius KappaCCD diffractometer	3921 independent reflections
Radiation source: fine-focus sealed tube	2968 reflections with I > 2σ(I)
graphite	Rint = 0.054
Detector resolution: 9 pixels mm-1	θmax = 27.1°, θmin = 3.0°
ω–scans with 2.00° and 40 sec per frame	h = −11→11
Absorption correction: multi-scan (SADABS; Bruker–Nonius, 2002)	k = −13→12
Tmin = 0.969, Tmax = 0.982	l = −14→14
23641 measured reflections