Figures of 1H NMR spectra (for compounds 3a–g, 4a,b, and 5), 2D 1H–1H COSY NMR spectra (for compounds 3c–f), 1H–13C HSQC NMR spectra (for compound 3f) as well as full VT 1H NMR spectra for compound 3c (in DMSO-d6 solution), compound 3f (in DMSO-d6 and MeCN-d3 solutions), and compound 3g (in MeCN-d3 solution); single-crystal X-ray analysis data with ORTEP diagrams of the asymmetric unit for compounds 3c–g and 4a,b; and figures of Hirshfeld surfaces and energy frameworks calculated with CrystalExplorer software