(e)
Figure 1. The QTAIM{q,} path-packets of the [4]cumulene, S-1,5-dimethyl-[4]cumulene and the (-)S(-), (+)S(-) and (+)S(+) conformations of S-1,5-diamino-[4]cumulene molecular graphs are presented for the geometrical dihedral angle ϕ = 0.0° in sub-figures (a-e) respectively.