SYNTHESES AND CHARACTERIZATION OF THE π-ALLYL- RARE EARTH COMPLEXES AND STUDIES ,ON THE MECHENISM OF OLIFEN POLYMERIZATIONII.SIUDIES ON MECHENISM OF ISOPRE NE POLYMERIZATION IN THE PRESENOE OF [LI(2.5D)] [Y(π-G3H5)4]
LI Feng-fu, JIN Ying-tai, PEI Feng-kui, ZHANG Xi-tian, WANG Fo-song. SYNTHESES AND CHARACTERIZATION OF THE π-ALLYL- RARE EARTH COMPLEXES AND STUDIES ,ON THE MECHENISM OF OLIFEN POLYMERIZATIONII.SIUDIES ON MECHENISM OF ISOPRE NE POLYMERIZATION IN THE PRESENOE OF [LI(2.5D)] [Y(π-G3H5)4][J]. Acta Polymerica Sinica, 1991,(5):631-634.
LI Feng-fu, JIN Ying-tai, PEI Feng-kui, ZHANG Xi-tian, WANG Fo-song. SYNTHESES AND CHARACTERIZATION OF THE π-ALLYL- RARE EARTH COMPLEXES AND STUDIES ,ON THE MECHENISM OF OLIFEN POLYMERIZATIONII.SIUDIES ON MECHENISM OF ISOPRE NE POLYMERIZATION IN THE PRESENOE OF [LI(2.5D)] [Y(π-G3H5)4][J]. Acta Polymerica Sinica, 1991,(5):631-634.DOI:
[Li(2.5D)] [Y(π-C3H5)4] was used as a catalyst for isoprene polymerization giving 57.9% cis-1
4 polyisoprene with high activity. The result of 13C-NMR study on the polymer shows that the terminal chains are -CH2-CH = CH1 which indicates that the insertion reaction of monomer occured between belween yttrium and π-allyl. The result above is the first direct evidence for the π-alyl mechenism of diene polymerization with rare earth coordination catalysts.