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I have been looking for a rationale on this as massive polycyclic aromatic hydrocarbons have been synthesized this way, and with Graphene just being an indefinite expansion of aromatic rings, this has made me rather curious.

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    $\begingroup$ Alkyne trimerization gives substituted benzene, not graphene. $\endgroup$ Oct 2, 2021 at 8:41
  • $\begingroup$ Yes, but the question is aimed at what prevents using this technique from forming Graphene? Would it no be possible to form a metal alkyne complex bonded to three diacteylene's, and hence, form graphene? $\endgroup$ Oct 3, 2021 at 1:16
  • $\begingroup$ Trimerization of diacetylene will give you benzene substituted with some acetylene tails. Further trimerization of that will give you some linked system of benzene rings, but not graphene. See, it still has some hydrogens. Graphene has none. $\endgroup$ Oct 3, 2021 at 1:37
  • $\begingroup$ Also: en.wikipedia.org/wiki/Alkyne_trimerisation?wprov=sfla1 $\endgroup$ Oct 3, 2021 at 9:20
  • $\begingroup$ PAHs with limited number of rings has been made from alkyne (e.g. here and here). But then making graphene from alkyne is still a long shot. $\endgroup$ Dec 30, 2021 at 4:50

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