Selenophosphine Derivatives with Pendant Electron-Rich Fe(κ2-dppe)(η5-C5Me5)C≡C– Substituents

A [C1 + C2] route to propargylidyne complexes

The reactions of [W(CBr)(CO)₂(Tp*)] with a range of terminal alkynes (RCCH), mediated by [Pd(PPh₃)₄] and CuI, afford new propargylidynes [W(C–CCR)(CO)₂(Tp*)] [R = ^tBu, C₆H₄X (X = H, NH₂, NO₂), APh₃ (A = C, Si, Ge), B(O₂CCH₂)₂NMe].