After establishing computational procedures to obtain reliable doublet-quartet gaps from DFT and wavefunction-based multi-reference methods on the prototypical system of Rajca's triradical, we proceed further to model three possible triradicals based on Blatter's radical system as shown in As in the previous case, we have confirmed the triradical character of these molecules by looking at the natural occupation numbers of their SOMOs as obtained from the CAS (9,9) calculations. The occupation numbers 1.00, 1.00 and 0.99 are obtained (Table ), confirming the ideal triradical nature of these molecules. Further analysis of occupancy of natural orbitals for each states obtained from CAS(9,9) also confirms the existence of three unpaired electrons in the three natural orbitals in these states (Table ).