The stepwise reaction of terminal alkynes
with [(OC)Pt(μ-PBut
2)2Pt(H)(PBut
2H)]OTf yields intermediate η1-alkynyl−hydride-bridged complexes, and
then stable η1-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 methoxycarbonyl complex.
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