Synthesis and redox properties of a meso-tris(4-nitrophenyl) corrolato Mn(III) complex

QC 20100525
The Mn complexated corrole [T(4-NO2P)Corr]Mn(py) (3) has been prepared (py = pyridine) where [T(4-NO2P)Corr] is the trianion of the electron-poor 5,10,15-tris(4-nitrophenyl)-corrole (1). The preparation of 3 includes a new synthetic method to form the corrole ligand 1 in a two-step synthesis. The Mn(III) complex gives a parallel mode EPR signal centered around g = 8.2 with six distinct hyperfine lines (A(parallel to) = 139 x 10(-4) cm(-1)). Electrochemically 3 undergoes one reversible oxidation (E-1/2 = 0.12 V vs Fc) and two reversible reductions (E-1/2 = -1.45, -1.61 V). The oxidation is metal-centered and the product has been characterized by EPR spectroscopy as an S = 3/2 Mn(IV) species with no indication for oxidation of the macrocycle. The reductions of complex 3 are ligand based, and at the potential of the second reduction step a stable nitrogen centered radical with g = 2.0055 is generated. Chemical oxidation of 3 by iodosobenzene yields a Mn(IV) complex and epoxidation of cis-stilbene is not catalyzed by the Mn complex.

Ingår i:Journal of Porphyrins and Phthalocyanines9:6, s. 379-3861088-42461099-1409

Av författaren/redakt...: Fryxelius, J.; Eilers, G.; Feyziyev, Y.; Magnuson, A.; Sun, Licheng C.; Lomoth, R.

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.