5,6,11,12,17,18-Hexadehydro-1,4,7,10,13,16-hexaethynyltribenzo[a,e,i,]cyclododecene: Synthesis and CpCo-Catalyzed Cycloisomerization to the First Superdelocalized Oligophenylenes
5,6,11,12,17,18-Hexadehydro-1,4,7,10,13,16-hexaethynyltribenzo[a,e,i,]cyclododecene: Synthesis and CpCo-Catalyzed Cycloisomerization to the First Superdelocalized Oligophenylenes