Selective dimerization of terminal alkynes promoted by the cationic actinide compound [(Et2N)3U] [BPh4]. Formation of the alkyne π-complex [(Et2N)2U(C≡CtBu)(η 2-HC=CtBu)][BPh4]

Organometallics

Volumn 18, Issue 13, 1999, Pages 2407-2409

  Wang, Ji Quan ^b   Dash, Aswini K ^b   Berthet, Jean Claude ^a   Ephritikhine, Michel ^a   Eisen, Moris S ^b  

^a TECHNION ISRAEL INSTITUTE OF TECHNOLOGY   (Israel)

^b CEA SACLAY   (France)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0000383810     PISSN: 02767333     EISSN: None     Source Type: Journal    
DOI: 10.1021/om980973w     Document Type: Article

References (25)

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20. Please see Supporting Information for kinetics and equilibrium graphics and the full characterization of products.
21. An inverse dependence rate in alkyne can be obtained also if a different competing protonolytic reaction takes place. Since the dimerization of the alkyne is chemically clean, yielding only the geminal dimer, this plausible route can be disregarded.
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24. 2-alkyne-acetylide complex as a part of the catalytic cycle will account only for a first-order dependence in alkyne. This type of complex has been proposed for lanthanide complexes but does not corroborate with our kinetic studies. den Haan, K. H.; Wielstra, Y.; Teuben, J. H. Organometallics 1987, 6, 2053.
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