In addition, this new resonance has also a large effect on the Seeback coefficient (S), being proportional to the slope of T(E) v/s E near the Fermi energy. More interestingly, radical wires have also shown a tendency to exhibit an increasing conductance as their molecular length increases. Whilst, a significantly enhanced conductance has been reported continuously for radicalbased junctions, little is known about electron transport properties of such di-and triradicals. Di-and tri-radicals are the species containing two and three unpaired electrons distributed in two and three near-degenerate orbitals, respectively, potentially used as building blocks of organic magnets. Nevertheless, there has been a significant interest in understanding the relationship between magnetism and conductivity at the single molecular level. A key question raised and addressed by the community involves if the electronic structure and properties of a given molecular bridge are transferable between different manifestations, such as magnetic exchange coupling between spin centers and conductance through molecular junctions. A stronger antiferromagnetic coupling being correlated to higher conductance for a given bridge was predicted. The trends in spin state energy splittings which drives the exchange couplings and the energy gaps between the frontier orbitals which dominate conductance were also pointed out for linear carbon chains. However, all the aforementioned studies involves either the radical groups or thiolated gold electrodes attached to both ends of the molecular bridge. On the other hand, the simultaneous pres- shell singlet as well as triplet state using temperature, bias voltage and external magnetic field. In a theoretical study, Cho et al. investigated the effect of increasing the number of magnetic units on the spin filtering efficiency. However, the key questions remains such as whether one can expect a enhancement in conductance by increasing the number of unpaired electrons on the central bridging molecule, i.e. on moving from mono-to di-and tri-radicals. More specifically, we aimed to investigate if the strong exchange couplings prevailing between the spin centers can contribute to the higher conductance of the molecular junction containing di-and tri-radicals. In other words, how the spin-exchange internal to the molecule can be used to control the electron flow through it. An important related question also concerns the impact of the coupled, cross-coupled or decoupled exchange and conductance pathways on molecular conductance and exchange coupling. To answer this, here, in this work, we investigated the magnetic exchange couplings and spin-polarized electron transport properties using Blatter's radical as a central spin bearing unit connected to one or more radical centers. The spin-polarized electron transport have been explored using non-equilibrium Green's function approach combined with density functional theory (NEGF-DFT) by incorporating open shell Blatter's based radicals in between two nine-atomic gold clusters via thiol anchoring atoms, as shown in Figure . The magnetic exchange couplings are predicted within the broken-symmetry (BS-DFT) formalism. Through a comprehensive examination, we demonstrate that it is not the absolute number of unpaired electrons, but the topology of bridging open shell SOMO's which plays a decisive role in controlling the conduction. Afterwards, several Blatter's based di-and tri-radicals are designed with strong ferromagnetic exchange interactions, which turned out to be promising candidates for molecular spintronics.