Snapshot of cyclooctyne ring-opening to a tethered alkylidene cyclic polymer catalyst,Chemical Science

当前位置： X-MOL 学术 › Chem. Sci. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Snapshot of cyclooctyne ring-opening to a tethered alkylidene cyclic polymer catalyst
Chemical Science ( IF 7.6 ) Pub Date : 2024-08-30 , DOI: 10.1039/d4sc04411h
Javier M Hurst ₁ , Rinku Yadav ₁ , Parker T Boeck _{1,

2} , Ion Ghiviriga _{1,

2} , ChristiAnna L Brantley _{1,

2} , Łukasz Dobrzycki _{1,

2} , Adam S Veige _{1,

2}

Affiliation

Cyclooctyne reacts with the trianionic pincer ligand supported alkylidyne [^tBuOCO]WCC(CH₃)₃(THF)₂ (1) to yield tungstacyclopropene (3) and tungstacyclopentadiene (4) complexes. The ratio of 3 and 4 in the reaction mixture depends on the stoichiometry of the reaction. The maximum concentration of 3 occurs with one equiv. of cyclooctyne and 4 is the exclusive product of the reaction above three equivalents. Both complexes 3 and 4 convert to the cyclooctyne ring-opened product 5 upon heating. While the conversion of 4 to 5 is accompanied by formation of polycyclooctyne as a white precipitate during the reaction, conversion of 3 to 5 is homogeneous. Exhibiting Ring Expansion Polymerization (REP), complexes 4 and 5 initiate the polymerization of phenylacetylene to generate cyclic poly(phenylacetylene) (c-PPA).

中文翻译：

束缚烷基环状聚合物催化剂的环辛炔开环快照

环辛炔与三离子钳形配体负载的烷基作用 [^tBuOCO]WCC（_{CH 3}）₃（THF）₂ （1）反应，生成钨环丙烯（3）和钨环戊二烯（4）络合物。反应混合物中 3 和 4 的比例取决于反应的化学计量。1 当量的环辛炔出现最大浓度 3,4 是上述 3 当量反应的独占产物。络合物 3 和 4 在加热时都转化为环辛炔开环产物 5。虽然 4 到 5 的转化伴随着多环辛炔在反应过程中形成白色沉淀，但 3 到 5 的转化是均匀的。表现出扩环聚合（REP），配合物 4 和 5 引发苯乙炔的聚合，生成环状聚苯乙炔（c-PPA）。

更新日期：2024-08-30

点击分享查看原文

点击收藏

公开下载

阅读更多本刊新发论文本刊介绍/投稿指南