Proton-Coupled Electron Transfer in the Reaction of 3,4-Dihydroxyphenylpyruvic Acid with Reactive Species in Various Media

Table 4

Abstraction free energies of electron, proton, and hydrogen atom from a phenolic acid ROH in kJ/mol.

	Media	ROH ROH^+ +	ROH RO^− + H^+	ROH RO^• + ^•H
DHPPA3	Vacuum	699.4	1339.2	270.0
	Cyclohexane	604.8	488.3	254.4
	Benzene	581.9	283.5	254.8
	Methanol	428.7	172.9	263.6
	DMSO	428.0	91.9	263.7
	Water	408.1	185.8	310.8
DHPPA4	Vacuum	699.4	1355.3	288.4
	Cyclohexane	604.8	500.3	264.0
	Benzene	581.9	295.4	263.2
	Methanol	428.7	174.4	256.3
	DMSO	428.0	92.9	256.1
	Water	408.1	186.5	304.6
DHPPA8	Vacuum	699.40	1363.5	280.5
	Cyclohexane	604.78	506.9	257.3
	Benzene	581.87	301.6	256.8
	Methanol	428.71	174.9	252.7
	DMSO	428.04	94.9	253.0
	Water	408.1	187.4	298.5