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- Title
Regio- and Stereochemical Control in Ocimene Polymerization by Half-Sandwich Rare-Earth Metal Dialkyl Complexes.
- Authors
Peng, Deqian; Du, Gaixia; Zhang, Pengfei; Yao, Bo; Li, Xiaofang; Zhang, Shaowen
- Abstract
The polymerization of ocimene has been first achieved by half-sandwich rare-earth metal dialkyl complexes in combination with activator and Al iBu3. The regio- and stereoselectivity in the ocimene polymerization can be controlled by tuning the cyclopentadienyl ligand and the central metal of the complex. The chiral cyclopentadienyl-ligated Sc complex 1 prepares syndiotactic cis-1,4-polyocimene ( cis-1,4-selectivity up to 100%, rrrr = 100%), while the corresponding Lu, Y, and Dy complexes 2- 4 and the achiral pentamethylcyclopentadienyl Sc, Lu, and Y complexes 5- 7 afford isotactic trans-1,2-polyocimenes ( trans-1,2-selectivity up to 100%, mm = 100%).
- Subjects
POLYMERIZATION; ALKYL compounds; RARE earth metal compounds; ISOTACTIC polymers; CHEMICAL reactions
- Publication
Macromolecular Rapid Communications, 2016, Vol 37, Issue 12, p987
- ISSN
1022-1336
- Publication type
Article
- DOI
10.1002/marc.201600102