The combination of the two orbital-gradient pairs is shown in the last column of Figure . The contribution from ∇ψHOMO • ψHOMO-1 is shown in the top and ∇ψHOMO-1 • ψHOMO is shown in the bottom. Notably, ψ b accentuates regions of the gradient with large isovalues (lobes) and limits contributions from regions with isovalues near or at zero (nodes). Although this is the same fundamental mechanism driving the current density of 1, the result is different. For 1, the non-overlapping nodal planes between bonds in its MOs (as visualized in the HOMO and HOMO-1 in Figure )lead to a consequent absence of nodal planes between bonds in the resulting current density . In contrast, for 2, the combined effect of the gradients across the nodal planes and the MOs results in the current density curving away from the bonds.