. 2021 Sep 2;6(36):23621–23629. doi: 10.1021/acsomega.1c03872

Table 2. Gibbs Free Energies of Common R^• Absorbing Hydrogen Atoms [ΔG_HA^o(R^•)] in Acetonitrile (kcal/mol)²⁹.

R–H	resulting radical types	solvents	ΔG_HA^o(R^•)^a
TEMPO^•	O-radical	CH₃CN	61.6
2,4,6-tBu₃-PhO^•	O-radical	CH₃CN	72.2
tBu₂NO^•	O-radical	CH₃CN	60.3
PrNH^•	N-radical	CH₃CN	83.7
Et₂N^•	N-radical	CH₃CN	79.3
tBuNH^•	N-radical	CH₃CN	83.9
C₆H₅–CH₂^•	C-radical	CH₃CN	82.1
CpFe(CO)₂^•	Fe-radical	CH₃CN	45.4
CpRu(CO)₂^•	Ru-radical	CH₃CN	53.3
CpCr(CO)₃^•	Cr-radical	CH₃CN	56.6
CpMo(CO)₃^•	Mo-radical	CH₃CN	57.5
CpW(CO)₃^•	W-radical	CH₃CN	60.7
Mn((CO)₅^•	Mn-radical	CH₃CN	57.9
Re(CO)₅^•	Re-radical	CH₃CN	63.0

ΔG_HA^o(R^•) = −BDFE(R–H) + 4.9 kcal/mol.²⁹

Table 2. Gibbs Free Energies of Common R• Absorbing Hydrogen Atoms [ΔGHAo(R•)] in Acetonitrile (kcal/mol)29.