Paper
Stereospecific catalytic precision polymerization of 2-vinylpyridine via rare earth metal-mediated group transfer polymerization with 2-methoxyethylamino-bis(phenolate)-yttrium complexes
Published Sep 22, 2015 · Peter T. Altenbuchner, F. Adams, A. Kronast
Polymer Chemistry
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Abstract
2-Methoxyethylamino-bis(phenolate)-yttrium complexes were employed in the catalytic precision polymerization of 2-vinylpyridine (2VP). The C1-symmetric catalyst systems are able to isospecifically polymerize prochiral 2-vinylpyridine with moderate to high activities. Tacticities ranging from atactic to isotactic can be achieved (Pm = 0.54–0.74). Mechanistic studies through 13C NMR microstructure analysis of the resulting isotactic P2VP show an enantiomorphic site control mechanism.
2-Methoxyethylamino-bis(phenolate)-yttrium complexes effectively catalyze stereospecific precision polymerization of 2-vinylpyridine with moderate to high activities and enantiomorphic site control.
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