Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds involving l.s. planes.

Refinement. A single-crystal was mounted on a MiTiGen loop and data collection was carried out in a cold stream of nitrogen. All diffractometer manipulations were carried out using Bruker APEX3 software (Bruker-AXS, 2016). Structure solution and refinement were carried out in the OLEX2 (Dolomanov et al., 2009) program using SHELXT (Sheldrick, 2015a) and SHELXL (Sheldrick, 2015b) softwares. All hydrogen atoms within the structure were placed in geometrically idealized positions and were constrained to ride on their parent atoms (C–H = 0.95 Å). The absence of additional symmetry was confirmed using ADDSYM incorporated in the PLATON program (Spek, 2020). The presence of inter- or intramolecular hydrogen bonds was probed, but not observed below a limit of 3.40 Å with a D–H···A angle of less than 120°.