Regio‐ and Stereochemical Control in Ocimene Polymerization by Half‐Sandwich Rare‐Earth Metal Dialkyl Complexes | Zendy

Peng Deqian | Zendy; Du Gaixia | Zendy; Zhang Pengfei | Zendy; Yao Bo | Zendy; Li Xiaofang | Zendy; Zhang Shaowen | Zendy

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Regio‐ and Stereochemical Control in Ocimene Polymerization by Half‐Sandwich Rare‐Earth Metal Dialkyl Complexes

Author(s) -

Peng Deqian,

Du Gaixia,

Zhang Pengfei,

Yao Bo,

Li Xiaofang,

Zhang Shaowen

Publication year - 2016

Publication title -

macromolecular rapid communications

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.348

H-Index - 154

eISSN - 1521-3927

pISSN - 1022-1336

DOI - 10.1002/marc.201600102

Subject(s) - polymerization , cyclopentadienyl complex , selectivity , metal , stereoselectivity , tacticity , polymer chemistry , ligand (biochemistry) , chemistry , materials science , stereochemistry , polymer , organic chemistry , catalysis , biochemistry , receptor

The polymerization of ocimene has been first achieved by half‐sandwich rare‐earth metal dialkyl complexes in combination with activator and Al i Bu 3 . 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%).

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