As the Glaser coupling reaction is usually done with terminal alkynes with the hydrogen being straight, I wonder if the same reaction can occur in terminal alkynes connected to the backbone of a metal alkyne complexe.
As an example, in the trimerization reaction of acetylene, which happens with the formation of a metal alkyne complete; the hydrogens are bent in a v-shape to the carbon; not straight. Alkyne Trimerisation.
Would it be possible? If it weren’t the case, what would impede this reaction?