On the other hand, for Bl M R (BC), two Breit-Wigner resonances, marked as II with red and blue in the right panel of Figure , emerge below and above the Fermi energy, respectively, which gives rise to a much stronger conductance enhancement. As can be seen from Figure , the corresponding α-SOMO and β-SUMO are now efficiently coupled to both the electrodes, while HOMO and LUMO show uneven electronic coupling with the electrodes. Finally, the least of conductance observed for Bl M R (CD) can be ascribed to the fact that none of HOMO, LUMO and SOMO/SUMO is efficiently coupled to both the electrodes. Thus, we postulate that the conductance enhancement by an open shell radical species is controlled by the degree of delocalization and hence the coupling of partially filled SOMO and SUMO to the electrodes. The findings of a recent report by Zheng et al. also supports this guiding vision.