“…The H1, H2 and H3 atoms were positioned with idealized geometry (HFIX command) and refined using a riding model, with C-H = 0.95 Å and U iso (H) = 1.2U eq (C). SHELXL2016/6 (Sheldrick, 2015b), WinGX (Farrugia, 2012); molecular graphics: DIAMOND (Brandenburg, 2006), GOLD (Chen et al, 2015), MOPAC (Stewart, 2016), CRYSTAL EXPLORER (Wolff, et al, 2012); software used to prepare material for publication: publCIF (Westrip, 2010), enCIFer (Allen et al, 2004).…”