Abstract
With the planned synthesis of thermally stable, mononuclear bis(carbyne) complexes and the subsequent CC coupling of the two carbyne ligands to give an alkyne, F. Filippou et al. have been able to fully confirm the mechanism of C1 + C1‐coupling reactions using tungsten complexes. This mechanism could also play a role in the CC‐coupling reactions of carbonyl‐with carbonyl‐ and of carbonyl‐with isocyanide‐ligands to give the corresponding alkyne ligands (see also Communication on p. 1167ff.).