| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1323513 | Journal of Organometallic Chemistry | 2012 | 7 Pages |
Reactions of (κ3-polypyrazolylborato)(benzonitrile)rutheniums [RuCl{B(4-Ypz)4}(PhCN)2] {4-Ypz; 4-bromo-1-pyrazolyl (Y = Br) and 1-pyrazolyl (Y = H) groups} with terminal alkynes were studied. For the reactions with arylalkynes HCC(aryl) in the presence of NEt3, (arylmethyl)(carbonyl)rutheniums [Ru{CH2(aryl)}{B(4-Ypz)4}(CO)(PhCN)] were yielded, indicating alkyne CC bond cleavage, whereas in the absence of NEt3, arylalkyne polymerization proceeded instead of the (arylmethyl)ruthenium formation. Reasonably attributed reaction mechanism shows significant role of the vinylidene intermediates “RuCCH(aryl)”.
Graphical abstract(Polypyrazolylborato)(benzonitrile)rutheniums [RuCl{B(4-Ypz)4}(PhCN)2] {4-Ypz; 4-bromo-1-pyrazolyl and 1-pyrazolyl groups} were allowed to react with arylalkynes HCC(aryl) in the presence of NEt3 to afford (arylmethyl)(carbonyl)rutheniums [Ru{CH2(aryl)}{B(4-Ypz)4}(CO)(PhCN)], whereas in the absence of NEt3, arylalkyne polymerization proceeded instead. Reasonably attributed reaction mechanism shows significant role of the vinylidene intermediates “RuCCH(aryl)”.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Alkyne hydration. ► Arylalkyne polymerization. ► (Arylmethyl)(carbonyl) ruthenium. ► Role of NEt3.
