Abstract
Cul-catalysed reactions between halide complexes of Fe, Mo, W or Pt and an excess of buta-1,3-diyne in the presence of diethylamine lead to the formation of buta-1,3-diynyl compounds; elaboration of the diynyl ligand is achieved by replacement of H by either non-metal or metal groups, by coordination to the CC triple bonds and by incorporation of the terminal C atoms into clusters with consequent electronic rearrangement along the C4 chain.
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