“…Indeed, controlled polymerization of 2-VP has been achieved. 11,12 However, to date there has been no report on the polymerization of 2-VP and iPOx by FLPs. Accordingly, we disclose herein our results on the polymerization of 2-VP, iPOx, and 4-methyl-2-isopropenyl-2-oxazoline (MiPOx) by FLPs and CLPs consisting of LAs [including Al(C 6 F 5 ) 3 , B(C 6 F 5 ) 3 , MeAl(BHT) 2 (BHT = 4-Me-2,6-t-Bu 2 C 6 H 3 O) 13 and AlEt 3 ] and LBs [including phosphines t-Bu 3 P, Mes 3 P (Mes = 2,4,6-Me 3 C 6 H 2 ) and Ph 3 P], and N-heterocyclic carbene (NHC) bases [including 1,3-ditert-butylimidazol-2-ylidene (It-Bu), 1,3-di(2,4,6-trimethylphenyl)imidazol-2-ylidene (IMes), and 1,3,4-triphenyl-4,5-dihydro-1H-1,2,4-trizazol-5-ylidene (TPT)] (Scheme 1).…”