Fig. 8. The shape of the deformation densities Δρ of [7a]²⁺, which are associated with ΔE_orb calculated at the BP86(D3BJ)/TZ2P level; relativistic effects were considered with ZORA. The eigenvalue ν gives the value of the charge migration. The direction of the charge flow is from red to blue. Colour code: carbon – grey, oxygen – red, ruthenium – turquoise.