Cr(III) metal ion in low spin triamidoamine-supported chromium(III) carbonyl complex {[(RN)3N]CrCO, 1} has a unique feature of S=1/2 being unusual for a Cr(III) metal ion, which is high spin with S=3/2 in most complexes and this gives us the basis for this theoretical study. The primary preoccupation has been to determine the electronic ground state and other low-energy state with much emphasis ...