Abstract : One-electron reductions of [Cl(dppe)(2)Ru=C=C=CR2]PF6 (R = Ph, Me) and [Cl(dppe)(2)Ru=C=C=C=C=CPh2]PF6 with Co(C5H5)(2) provide radical species with the unpaired electron localized on the trisubstituted carbon atom of the cumulene moiety as shown by hydrogen atom capture and EPR spectroscopy.
Stéphane Rigaut, O Maury, D Touchard, Ph Dixneuf. New paramagnetic ruthenium complexes via one-electron reduction of metallacumulenes. Chemical Communications, Royal Society of Chemistry, 2001, pp.373--374. ⟨10.1039/b008893p⟩. ⟨hal-01475066⟩