Bruker APEXII CCD diffractometer	1589 independent reflections
Radiation source: fine-focus sealed tube	1048 reflections with I > 2σ(I)
graphite	Rint = 0.048
φ and ω scans	θmax = 28.4°, θmin = 1.5°
Absorption correction: multi-scan (SADABS; Bruker, 2007)	h = −7→8
Tmin = 0.976, Tmax = 0.995	k = −9→9
5950 measured reflections	l = −22→35