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Tang H, Boyle PD, Novak BM. Chiroptical Switching Polyguanidine Synthesized by Helix-Sense-Selective Polymerization Using [(R)-3,3‘-Dibromo-2,2‘-binaphthoxy](di-tert-butoxy)titanium(IV) Catalyst. J. Am. Chem. Soc. 2005 Jan 28;127(7):2136–42. doi: 10.1021/ja0453533. |