Table 3. Isomerization Experiments with Additives^a.

entry	additive (mol %)	solvent	yield (%)	E/Z ratio
1	TEMPO (12.5)	THF	97	99:1
2	pyridine (12.5)	THF	77	96:4
3	PMe3 (12.5)	THF

^aReaction conditions: 1-allyl-4-fluorobenzene (0.5 mmol), Mn4 (2.5 mol %), additive (12.5 mol %), and 1,4-dioxane as an internal standard (0.13 mmol) in THF-d₈ (0.5 mL) at 25 °C for 10 h. Yield and the E/Z ratio were determined by ¹⁹F and ¹H NMR spectroscopy.