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Updated: Aug 9, 2026

Ethylene Polymerizations Using Parallel Pressure Reactors and a Kinetic Analysis of Chain Transfer Polymerization
07:28

Ethylene Polymerizations Using Parallel Pressure Reactors and a Kinetic Analysis of Chain Transfer Polymerization

Published on: November 27, 2015

ダブルヴィニリデンの再編成によるアルキンの二重挿入による希少なエタ2-ブタディエニル複合体

Xingwei Li1, Christopher D Incarvito, Robert H Crabtree

  • 1Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, USA.

Journal of the American Chemical Society
|March 27, 2003
PubMed
まとめ

研究者らは,ダブルアルキンの挿入と再配置によって形成された珍しいeta2-butadienyl iridium (((III)) 複合体を発見した. この研究は,有機金属化学における主要なアルキンの再配置のステップの分子内性質を確認している.

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E2 Reaction: Stereochemistry and Regiochemistry02:43

E2 Reaction: Stereochemistry and Regiochemistry

Elimination reactions of alkyl halides can yield one or more alkenes depending on the specific regiochemical and stereochemical considerations. While the regiochemistry of the reaction governs the location of the double bond in the product, the stereochemical requirements often influence the geometry.
When a substrate with two different β hydrogens undergoes an E2 elimination, the presence of a strong base can yield two regioisomeric alkenes. The more-substituted alkene is the major product and...
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[4+2] Cycloaddition of Conjugated Dienes: Diels–Alder Reaction

The Diels–Alder reaction is an example of a thermal pericyclic reaction between a conjugated diene and an alkene or alkyne, commonly referred to as a dienophile. The reaction involves a concerted movement of six π electrons, four from the diene and two from the dienophile, forming an unsaturated six-membered ring. As a result, these reactions are classified as [4+2] cycloadditions.
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Acyclic diene metathesis polymerization or ADMET polymerization involves cross-metathesis of terminal dienes, such as 1,8-nonadiene, to give linear unsaturated polymer and ethylene. As ADMET is a reversible process, the formed ethylene gas must be removed from the reaction mixture to complete the polymerization process.
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...
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[3,3] Sigmatropic Rearrangement of Allyl Vinyl Ethers: Claisen Rearrangement

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