Naphthylazoimidazole complexes of tetracarbonylchromium and molybdenum: Synthesis, spectra, electrochemistry and photophysical studies

Cis-[M(CO)4(α/β-NaiR′)] (M = Cr(0), Mo(0) and α/β-NaiR′ = 1-alkyl-2-(naphthyl-α/β-azo)-imidazoles) are described in this work. Fluorescence shows a π-π∗ emission. Cyclic voltammetry gives two metal centred oxidations, M+/M0 and M2+/M+, and two ligand centred reductions, azo/azo− and azo−/azo=.