Table 1. Crystallographic, Optical, and Electrochemical Data for the Trityl Radicals Reported Here.

R =	Θaveragea	Σanglesb	λmax (nm)c	ε (M–1 cm–1)c	E(+/•)d	E(•/−)d	ΔEe	3σp67
Me2N			403f	58,000f	–1.17	[−2.14]	1.07	–2.49
MeO	36.3°	360.0(5)°	536	560	–0.58	[−1.84]	1.30	–0.81
tBu	31.0°	360.0(5)°	525	815	[−0.40]	[−1.77]	1.37	–0.48
Ph	30.8°	359.9(7)°	565	1000	[−0.30]	[−1.44]	1.14	–0.03
Cl	27.0°	360.0(2)°	536	380	0.00	[−1.27]	1.27	0.69
CF3	32.7°	360.0(3)°	522	1240	0.29	–1.10	1.39	1.62
NO2	32.0°44	360(1)°	61932 g	n/a				2.28

^aDihedral angle defined as the angle between the plane of a phenyl group and the plane of the central 4 carbons.

^bSum of angles around central methyl carbon.

^cReported at room temperature in toluene unless otherwise noted. Molar extinction coefficients are reported with an uncertainty of ±3%.

^dPotentials in MeCN are reported as V vs Fc/Fc+. Potentials are E_1/2 = (E_p,a + E_p,c)/2 except those in square brackets that are irreversible potentials, reported as the potential at the cathodic peak current, E_p,c.

^eΔE = E(+/•) – E(•/−).

^fReported at room temperature in MeCN.

^gReported in MeCN as a saturated solution, without a concentration listed.