Oligomerisation and stereoselective polymerisation of alkenes and alkynes using pyridyl-based Al(iii) catalysts
Dipanjana Choudhury, Richard Danylyuk, Alexandros Terzopoulos, Natalie S. Potter, Oren A. Scherman, Jonathan M. Goodman, Dominic S. Wright
TL;DR
Scientists created new aluminum-based catalysts that can efficiently polymerize alkenes and cyclotrimerize alkynes with high stereocontrol.
Contribution
This is the first report of stereoselective Al(iii) polymerization and alkyne cyclotrimerization using static main group metal catalysis.
Findings
The Al(iii) cationic catalysts polymerize alkenes with high stereoregularity, including syndiotactic polystyrene.
The catalysts cyclotrimerize terminal alkynes to form trisubstituted benzenes and fulvene.
Abstract
Dealkylation of the dimers [R2Al(2-py′)]2 (2-py′ = 6-substituted pyridyl, R = Me, iBu) with [Ph3C][B(C6F5)4] gives the putative cations [RAl(2-py′)2(µ-R)AlR]+ which can polymerise a range of alkenes with a high degree of stereoregularity (syndiotacticity in the case of polystyrene) and which cylotrimerise terminal alkynes to trisubstituted benzenes and a fulvene. This is the first report of stereoslective Al(iii) polymerisation and of the cyclotrimerisation of alkynes by static catalysis using a main group metal. The putative Al(iii) cationic catalysts [RAl(2-py′)2(µ-R)AlR]+ (2-py′ = 6-substituted pyridyl, R = Me, iBu) can polymerise terminal alkenes with a high degree of stereocontrol and cyclotrimerise terminal alkynes.
Genes, proteins, chemicals, diseases, species, mutations and cell lines named across the full text — each resolved to its canonical identifier and authoritative record.
Click any figure to enlarge with its caption.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12
Figure 13
Figure 14
Figure 15
Figure 16
Figure 17
Figure 18Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
Taxonomy
TopicsOrganoboron and organosilicon chemistry · Organometallic Complex Synthesis and Catalysis · Synthesis and characterization of novel inorganic/organometallic compounds