We used Dunning's cc-pVDZ and cc-pVTZ basis sets . Core electrons were frozen in all calculations. Unrestricted HF references were used in the calculations using open-shell references. For diradicals, we used the same geometries as in Ref. . The calculations for set 2 were carried out at their ground-state doublet geometries. The structures of AsN + and GeO + were optimized with EOM-IP-CCSD/cc-pVDZ from the neutral reference; CaF and CaOCH 3 were optimized with EOM-EA-CCSD/cc-pVDZ from the cationic reference.