Bruker Kappa APEXII CCD diffractometer	3697 independent reflections
Radiation source: fine-focus sealed tube	2444 reflections with I > 2σ(I)
graphite	Rint = 0.047
Detector resolution: 7.40 pixels mm-1	θmax = 28.7°, θmin = 3.6°
ω scans	h = −31→31
Absorption correction: multi-scan (SADABS; Bruker, 2005)	k = −4→5
Tmin = 0.879, Tmax = 0.888	l = −22→22
14048 measured reflections