Details

Autor(en) / Beteiligte

• Ananikov, Valentine P
• Beletskaya, Irina P
• Aleksandrov, Grigory G
• Eremenko, Igor L

Titel

Mechanistic Investigation and New Catalyst Design in Palladium- and Platinum-Catalyzed Se−Se Bond Addition to Alkynes

Ist Teil von

• Organometallics, 2003-03, Vol.22 (7), p.1414-1421

Ort / Verlag

American Chemical Society

Erscheinungsjahr

2003

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The present study explains the different catalytic activities of platinum and palladium in Se−Se addition reactions with alkynes. Under the catalytic conditions cis-[Pt(SePh)2(PPh3)2] undergoes fast isomerization to the trans isomer, which does not react with alkynes. Palladium complexes maintain their catalytic activity, due to the formation of the dinuclear structure [Pd2(SePh)4(PPh3)2]. It was shown that the palladium intermediate involved in the catalytic cycle can be prepared directly in the reaction mixture starting from the simple [PdCl2(PPh3)2] precursor, thus allowing replacement for the traditional Pd(PPh3)4 catalyst. X-ray analysis shows that the products of Se−Se addition reactions with alkynes possess the necessary geometry parameters for coordination as bidentate ligands.