249728-91-4Relevant academic research and scientific papers
The NMR spectroscopic and X-ray crystallographic study of the oxidative addition of bis(2-thienyl) diselenide to zerovalent palladium and platinum centers
Oilunkaniemi, Raija,Laitinen, Risto S.,Ahlgren, Markku
, p. 200 - 206 (2007/10/03)
The pathway of the reaction of dithienyl diselenide with tetrakis(triphenylphosphine)palladium(0) and -platinum(0) has been explored by the use of NMR spectroscopy and X-ray diffraction. The oxidative addition of dithienyl diselenide to [Pd(PPh3)4] mainly results in the formation of two isomers of dinuclear [Pd2(SeTh)4(PPh3)2] (Th = 2-thienyl, C4H3S) complex. The workup of the solution produced X-ray-quality crystals of trans-[Pd2(SeTh)4(PPh3)2]. The corresponding reaction with [Pt(PPh3)4], however, affords isomers of mononuclear [Pt(SeTh)2(PPh3)2]. Upon recrystallization from dichloromethane a small amount of crystals of dinuclear [Pt2(SeTh)4(PPh3)2] is obtained together with those of trans-[Pt(SeTh)2(PPh3)2]. While the products from both reactions imply that the oxidative addition takes place with the cleavage of the Se-Se bond, a small amount of trans-[PdCl(Th)(PPh3)2] is formed in the reaction of [Pd(PPh3)4] and Th2Se2 in dichloromethane indicating that C-Se cleavage may also take place during the oxidative addition.
