Alkyl-cobalt(III) Complexes of Aetioporphyrin I
David Dolphin and Johnson, A.W.
Chem. Communications London
MeCo(III) and EtCo(III) etioporphyrin I derivatives were prepared by the treatment of the Co(py)Br complex with RMgX in (MeO)2C2H4 (R is alkyl). Spectral evidence was obtained for the Co(III) analogs with allyl, C6H11, and Ph groups. The N.M.R. spectrum of the Me compound indicates that the Co is bonded to Me and to the porphyrin ring, but not to C5H5N. The alkyl compounds are stable toward KCN except in light.