Interestingly, conductance maps at different energies within the range of those broad resonances show a markedly different appearance. Focusing on the unoccupied states, as the energy is increased the maps show an increased signal first on the two central 4-membered rings (Figure ), then homogeneously distributed over the four 4-membered rings of the tetramer (Figure ), and finally on the 4-membered rings of the two outer units (Figure ). In contrast, as we move away from the Fermi energy for the occupied states, the signal is first strongest on the two central units (Figure ), then on the outer units (Figure ) and then appears homogeneously distributed over the four units (Figure ). The same findings, although with increased contrast, are obtained from constant current conductance maps (Figure ). DFT calculations on a free-standing tetramer reveal the DOS of the first three occupied and unoccupied states to have exactly the same distribution (the discrepancies between theory and experiment can be accounted for by the substrate-driven alternating tilt of the d2 units in the experiment and the planar structure in the calculations). We thus conclude that the broad resonances observed in the spectra correspond to a convolution of multiple orbitals. We have deconvoluted the various states fitting the spectra with a background and six Gaussian resonances, displayed with green, orange and light blue colored lines as their energy departs from the Fermi level for both occupied and unoccupied states (Fig. ). The fits of both spectra show the six resonances at the same energies (additionally marked by accordingly colored vertical lines) but with a varying intensity that follows the orbital's distribution measured experimentally and confirmed by theory (Fig. ). This overall nice agreement, along with the excellently matching DOS from experiment and calculations at the inter-unit junctions (Figure ), proves our structural assignment for the linking motif. Besides, annealing to even higher temperatures (at which additional cyclodehydrogenation events can be triggered) rendered different types of junctions that have instead been assigned to some of the other coupling motifs that were considered (Figure IV and V) by a comparison of their measured and calculated low-energy orbitals (Figure ). The resulting oligomers being conjugated structures, the HOMO-LUMO gap is expected to scale inversely with the molecular size. We have analyzed that behavior comparing oligomers with lengths from one single d2 unit to six of them (Figure ). The spectra indeed reveal the onset of the occupied and unoccupied frontier states to approach the Fermi level as the length increases, although with negligible changes for lengths above four units, for which the peak-to-peak of the fitted HOMO and LUMO resonances marked in green in Fig. amounts to 1.85 eV. Regardless of the oligomer length the conductance maps of the low-energy orbitals (Figure ) show the same intensity distribution: the unoccupied orbitals are most intense first on the central units, then all over the structure and thereafter on the outer units, whereas the occupied orbitals are most intense first on the central unit, then on the outer units and then all over the structure.