Y. Wakatsuki, M. Satoh, H. Yamazaki
Sep 1, 1989
Citations
0
Influential Citations
11
Citations
Journal
Chemistry Letters
Abstract
The acetylide complex [RuH(C≡C–But)(CO)(PPh3)3] (1) prepared from [Ru(H)Cl(CO)(PPh3)3)] (2) and Li–C≡C-But has been found to be a good precursor for the catalytic dimerization of t-butylacetylene to cis-1,4-di-t-butyl-1,2,3-butatriene. Room temperature reaction of 1 with HC≡CBut has afforded a new complex [Ru(C≡CBu)2(CO)(PPh3)3] which has been structurally characterized as possessing cis-diacetylide ligands. Reaction of 2 with 1,4-di-t-butylbutadiyne gave a complex with 1,4-di-t-butylbut-1-en-3-yn-2-yl ligand, [Ru–{C(=CHBut)–C≡CBut}Cl(CO)(PPh3)2], which decomposed at 60 °C to liberate cis-1,4-di-t-butylbutatriene. The reaction mechanism is discussed based on these findings.