“…Literature examples of LA and CL polymerization by zinc complexes are rather common ( Chisholm et al., 2000 , Honrado et al., 2016 , Lian et al., 2007 , Alonso-Moreno et al., 2008 , Schofield et al., 2009 , Mou et al., 2014 , Garcés et al., 2010 ), whereas examples of TMC and VL polymerizations are not as prevalent ( Vivas et al., 2003 , Gowda and Chakraborty, 2010 , Helou et al., 2008 ). Compared with other heteroscorpionate complexes, tris(pyrazolyl)borate complexes, and ligands with similar tripodal frameworks, both the oxidized and the reduced metal complexes display moderate activity for the polymerization of LA and CL ( Chisholm et al., 2000 , Honrado et al., 2016 , Lian et al., 2007 , Alonso-Moreno et al., 2008 , Schofield et al., 2009 , Mou et al., 2014 , Garcés et al., 2010 ). Similarly, the reduced species shows a moderate activity toward the polymerization of TMC and VL, whereas the oxidized compound shows high activity toward the same monomers ( Vivas et al., 2003 , Gowda and Chakraborty, 2010 , Helou et al., 2008 ).…”