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. 2020 Aug 11;117(34):20430–20437. doi: 10.1073/pnas.2009996117

Table 1.

Ground-state singlet (S0), and electronically excited triplet (T1)- and quintet (Q1)-state energetic minima (eV), computed using DFT and coupled cluster theory

FePZn FeNHCPZn
B3LYP TPSSh M06L B3LYP TPSSh M06L CCSD(T)
S0 0.00 0.00 0.00 0.00 0.00 0.00 0.00
T1 0.72 0.87 0.83 1.35 1.36 1.29 1.95
Q1 0.23 0.43 0.50 3.05 3.04 2.75 3.70