Catalytic performance of tantalum-η2-alkyne complexes [TaCl3(R1C≡CR2)L2] for alkyne cyclotrimerization

Toshiyuki Oshiki, Hiroshi Nomoto, Kouji Tanaka, Kazuhiko Takai

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)


Structurally characterized tantalum-η2-alkyne complexes [TaCl32-EtC=CEt)L2] (1, L2 = 1,2-dimethoxyethane (DME); 2, L = py) acted as catalysts for the cyclotrimerization of terminal alkynes. The catalytic reaction proceeded at 25 °C within few hours and the trisubstituted benzenes were obtained without the formation of linear oligomers. A new tantalum complex having a terminal alkyne ligand, [TaCl32-Me3SiC≡ CH)(dme)l (3), was prepared, and its catalytic performance was also investigated.

Original languageEnglish
Pages (from-to)1009-1011
Number of pages3
JournalBulletin of the Chemical Society of Japan
Issue number5
Publication statusPublished - 2004

ASJC Scopus subject areas

  • General Chemistry


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