Fig. 6: Tentative synthetic route to AKC-[3, 3] and PAK-[3, 3].
From: Prediction of highly stable 2D carbon allotropes based on azulenoid kekulene
The synthesis starts with the Ullmann coupling of the halogenated AK monomers followed by the dehydrogenation reaction. Pentagons and heptagons are shown with red and blue colors, respectively. The six carbon atoms inside each gray region are present in AKC-[3, 3]. In PAK-[3, 3], these carbon atoms are replaced with hydrogen atoms.
