(e)
Figure 1. The QTAIM{q,qʹ} 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.