Dipyrrinphenol-Mn(III) complex: synthesis, electrochemistry, spectroscopic characterisation and reactivity.

Sanae El Ghachtouli , Karolina Wójcik (1) , Laurent Copey (1) , Florence Szydlo , Eric Framery (2) , Catherine Goux-Henry (1) , Laurianne Billon , Marie-France Charlot (3) , Régis Guillot , Bruno Andrioletti (1) , Ally Aukauloo

1 ICBMS - Institut de Chimie et Biochimie Moléculaires et Supramoléculaires
2 CASYEN - Catalyse Synthèse et Environnement
3 ICMMO - Institut de Chimie Moléculaire et des Matériaux d'Orsay

Herein, we report the manganese complex with a novel trianionic ligand, the pentafluorophenyldipyrrinphenol ligand DPPH(3). The X-ray crystal structure reveals that the Mn(III) complex exists in a dimeric form in the solid state. Electrochemical studies indicate two quasi-reversible one electron oxidation processes. EPR data on the one electron oxidised species in solution support the formation of a monuclear Mn complex with an S = 3/2 spin system. Preliminary studies towards epoxidation reactions were tested in the presence of iodosylbenzene (PhIO) and are in favour of an oxygen-atom-transfer (OAT) reaction catalyzed by the Mn(III) complex.

Domaines: Chimie organique

Sanae El Ghachtouli, Karolina Wójcik, Laurent Copey, Florence Szydlo, Eric Framery, et al.. Dipyrrinphenol-Mn(III) complex: synthesis, electrochemistry, spectroscopic characterisation and reactivity.. Dalton Transactions, 2011, 40 (36), pp.9090-3. ⟨10.1039/c1dt10868a⟩. ⟨hal-00695893⟩