1992 Volume 65 Issue 4 Pages 1047-1051
The title complexes, [Co(cp)(S2C2Y2)](cp = η5-C5H5) (1) (a: Y = Ph, b: Y = 2-pyridyl, c: Y = 4-pyridyl, d: Y = −CO2Me, e: Y = −CN), [Co(cp)(S2C6H4)] (2), [Co(cp)(Se2C2Ph2)] (3), and [Co(cp)(SeSC2Ph2)] (4), are photochemically reduced to give one-electron reduced species, Co(II) complexes, under UV-irradiation in the presence of an electron donor, triethanolamine (TEOA), in acetonitrile solutions. The photoreduction is wavelength dependent. The 313 nm light is the most effective (Φ = 0.002–0.018) for all the complexes used, and the light of wavelength longer than 365 nm is ineffective for the photoreduction of 1–4. The irradiation with 254 nm light brings about decomposition of the complexes.
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