Refinement on F2	Hydrogen site location: inferred from neighbouring sites
Least-squares matrix: full	H atoms treated by a mixture of independent and constrained refinement
R[F2 > 2σ(F2)] = 0.038	w = 1/[σ2(Fo2) + (0.0556P)2 + 0.2388P] where P = (Fo2 + 2Fc2)/3
wR(F2) = 0.111	(Δ/σ)max = 0.004
S = 1.04	Δρmax = 0.19 e Å−3
2146 reflections	Δρmin = −0.28 e Å−3
179 parameters	Extinction correction: SHELXL97 (Sheldrick, 2008), Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4
Primary atom site location: structure-invariant direct methods	Extinction coefficient: 0.0200 (13)
Secondary atom site location: difference Fourier map