Table 2. Experimental details.

Crystal data
Chemical formula	C20H20BrClO3
M r	423.72
Crystal system, space group	Triclinic, P
Temperature (K)	296
a, b, c (Å)	7.5850 (7), 9.825 (1), 12.8466 (13)
α, β, γ (°)	87.176 (3), 85.069 (3), 82.934 (3)
V (Å3)	945.85 (16)
Z	2
Radiation type	Mo Kα
μ (mm−1)	2.33
Crystal size (mm)	0.32 × 0.27 × 0.24
Data collection
Diffractometer	Bruker SMART APEXII CCD
Absorption correction	Multi-scan (SADABS; Krause et al., 2015 ▸)
Tmin, Tmax	0.476, 0.570
No. of measured, independent and observed [I > 2σ(I)] reflections	14284, 4721, 4105
R int	0.035
(sin θ/λ)max (Å−1)	0.668
Refinement
R[F2 > 2σ(F2)], wR(F2), S	0.027, 0.066, 1.03
No. of reflections	4721
No. of parameters	227
H-atom treatment	H-atom parameters constrained
Δρmax, Δρmin (e Å−3)	0.39, −0.45

Computer programs: APEX2 and SAINT (Bruker, 2017 ▸), SHELXT (Sheldrick, 2015a ▸), SHELXL (Sheldrick, 2015b ▸) and Mercury (Macrae et al., 2020 ▸).