Chemistry Letters p. 215 - 216 (1995)
Update date:2022-08-11
Topics:
Imamura, Hayao
Suda, Eisaku
Konishi, Tomohiro
Sakata, Yoshihisa
Tsuchiya, Susumu
Europium and ytterbium catalysts separated on active carbon from a solution of lanthanide metals dissolved in liquid ammonia were found to be effective for oligomerization of alkynes.Selective cyclic dimerization and trimerization of propyne and ethyne to cyclohexadiene and benzene occurred during the oligomerization, respectively, in which the active catalysts were characterized as lanthanide imides induced by the thermal treatment.
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