期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 133, 期 6, 页码 1784-1786出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja110949f
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资金
- Department of Energy [DE-FG02-86ER13564]
- U.S. Army (Institute for Soldier Nanotechnology) [DAAD-19-02-D-0002]
- Agency for Science, Technology and Research (Singapore)
Ring-opening metathesis polymerization (ROMP) of rac-endo,exo-5,6-dicarbomethoxynorbornene (inter alia) yields a cis,syndio,alt-polymer, one in which the sequential units in the cis,syndiotactic polymer consist of alternating enantiomers. Cis selectivity arises through addition of the monomer to produce an all-cis-metallacyclobutane intermediate, while syndioselectivity and alternating enantiomer structures arise as a consequence of inversion of configuration at the metal center with each metathesis step.
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