Oxide radical ion Neptunate(VI) ion

Pikaev, A.K.; Shilov, V.P.
Bull. Acad. Sci. USSR, Div. Chem. Sci. 27, 1886-1889 (1978)

Reaction: O·^- + NpO₄^2- ® OH^- + NpO₄^-
Solvent: H₂O

k = 4.2 × 10⁷(L mol^-1 s^-1), pH = >12

Experimental method: Pulse radiolysis
Analytical method: vis-UV absorption
Data type: Absolute value measured directly

Product buildup kinetics (Np^VII) at 412 and 620 nm in N₂O-satd. soln. contg. 0.5-1.7 mol L^-1 LiOH; in acid soln. Np(VII) not formed.