Synthesis and characterization of platinum(0) alkene complexes; X-ray crystal structure determinations on [Pt(trans-PhCH=CHCHO)(PPh3)2] and [Pt(trans-PhCH=CHCOMe)(PPh3)2]

Article abstract of DOI:10.1016/S0277-5387(96)00348-8

Reaction of [Pt(C₂H₄)(PPh₃)₂] with a range of alkenes gave the complexes [Pt(alkene)(PPh₃)₂]. Complexes of alkenes bearing electron-withdrawing ligands were, predictably, more stable than those of electron-rich alkenes. The complexes were characterized by multinuclear (¹H, ¹³C, ³¹P and ¹⁹⁵Pt) NMR spectroscopy and the structures of the derivatives of trans-PhCH=CHCHO and trans-PhCH=CHCOMe were established by X-ray diffraction studies. The complexes reacted with PCy₃ to give [Pt(alkene)(PCy₃)(PPh₃)], usually as a mixture of regioisomers. Copyright