Bruker SMART APEXII CCD diffractometer	2071 independent reflections
Radiation source: fine-focus sealed tube	1853 reflections with I > 2σ(I)
graphite	Rint = 0.020
φ and ω scans	θmax = 28.0°, θmin = 1.8°
Absorption correction: multi-scan (SADABS; Bruker, 2001)	h = −29→29
Tmin = 0.916, Tmax = 0.981	k = −7→7
14196 measured reflections	l = −17→17