Carbon Substitution on N₂₄ Cages: Crossover between Triangular and Hexagonal Structures

Figure 2

Isomers of N₂₀C₄: (a) isomer T1, (b) isomer T2, (c) isomer S1, (d) isomer S2, (e) isomer H1, (f) isomer H2, (g) isomer H3, and (h) isomer H4. Carbon atoms are shown in black, and nitrogen atoms are shown in yellow.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)