名称:
Stable η1-Alkynyl−μ,η1:η2-Alkenyl Complexes from the Reaction of Terminal Alkynes with Encumbered Dinuclear Platinum Compounds and Their Formyl, Methoxycarbonyl, and Hydride Derivatives
摘要:
The stepwise reaction of terminal alkynes with [(OC)Pt(mu-PBu2t)(2)Pt(H)((PBu2H)-H-t)]OTf yields intermediate eta(1)-alkynyl -hydride-bridged complexes, and then stable eta(1)-alkynyl/alkenyl-bridged derivatives containing an electrophilic carbonyl ligand. The latter is attacked by nucleophiles (H- and MeO-) to give a rare platinum formyl species, which is slowly converted into a stable hydride or a stable methoxycarbanyl complex.