“…Recently, some ligands with both 1,3-dithiol-2-ylidene and bis(2-pyridine) units are studied [25][26][27][28][29][30][31][32][33][34][35]. For example, dimethyl 2-(di(2-pyridyl)methylene)-1,3-dithiole-4,5-dicarboxylate (Medpydt) has been used to prepare ClRe(CO) 3 (Medpydt) (1) and ClRe-(CO) 3 (H 2 bpydt) (2) [31,32].…”