. Author manuscript; available in PMC: 2010 Aug 26.

Published in final edited form as: J Am Chem Soc. 2009 Aug 26;131(33):11985–11997. doi: 10.1021/ja904400d

Table 3.

Eyring and Arrhenius Parameters for H- and D-Atom Transfer Reactions.^a

Reaction	Solvent	T (K)	ΔH^‡	ΔS^‡	E_a	log A
4-oxo-TEMPO^• + TEMPO-H^b	MeCN	278−318	3.0 ± 0.5	−43 ± 3	3.6 ± 0.5	3.8 ± 0.6
4-oxo-TEMPO^• + TEMPO-D	MeCN	278−318	4.3 ± 0.4	−46 ± 2	4.9 ± 0.4	3.3 ± 0.4
4-oxo-TEMPO^• + TEMPO-H	CH₂Cl₂	273−308	3.0 ± 0.4	−41 ± 2	3.6 ± 0.4	4.3 ± 0.4
4-oxo-TEMPO^• + TEMPO-D	CH₂Cl₂	273−308	3.3 ± 0.4	−46 ± 2	3.9 ± 0.4	3.2 ± 0.4
4-oxo-TEMPO^• + 4-MeO-TEMPO-H	MeCN	278−318	4.8 ± 0.3	−38 ± 2	5.4 ± 0.3	4.9 ± 0.4
4-oxo-TEMPO^• + 4-MeO-TEMPO-D	MeCN	288−328	5.4 ± 0.3	−42 ± 2	6.0 ± 0.3	4.0 ± 0.4
^tBu₂NO^• + TEMPO-H	MeCN	278−318	7.7 ± 0.3	−31 ± 2	8.3 ± 0.3	6.4 ± 0.4
^tBu₂NO^• + TEMPO-D	MeCN	278−318	5.1 ± 0.3	−45 ± 2	5.7 ± 0.3	3.3 ± 0.4
^tBu₂NO^• + TEMPO-H	CH₂Cl₂	273−308	7.1 ± 0.3	−32 ± 2	7.6 ± 0.3	6.3 ± 0.4
^tBu₂NO^• + TEMPO-D	CH₂Cl₂	273−308	4.0 ± 0.3	−47 ± 2	4.5 ± 0.3	2.9 ± 0.4
PINO^• + 4Me-NHPI^c	AcOH	290−309	9.8 ± 0.2	−13 ± 1	10.4 ± 0.2	10.4 ± 0.2
4-Me-PINO^• + NHPI^c	AcOH	290−309	10.0 ± 0.2	−13 ± 1	10.6 ± 0.2	10.4 ± 0.2

ΔH^‡, E_a in kcal mol⁻¹; ΔS^‡ in cal mol⁻¹ K⁻¹.

Originally reported in ref. 20.

Ref. ¹⁸.