Axially chiral allenyl gold complexes.

摘要: Unprecedented allenyl gold complexes have been achieved starting from triphenylpropargylphosphonium bromide. Two different coordination modes of the allene isomer triphenylphosphoniumpropargylide to found depending on oxidation state. Bromo-, pentafluorophenyl-, and triphenylphosphine–gold(I) were prepared in which α carbon coordinates gold(I) center. A chiral pentafluorophenyl–gold(III) complex with atoms coordinated γ was also prepared. All structurally characterized by X-ray diffraction showing characteristic distances for a C═C═C unit.