Bulletin of the Chemical Society of Japan
Online ISSN : 1348-0634
Print ISSN : 0009-2673
ISSN-L : 0009-2673
Photochemical Reduction of (η5-Cyclopentadienyl)(1,2-disubstituted 1,2-ethylenedichalcogenolato)cobalt(III) and (η5-Cyclopentadienyl)(1,2-benzenedithiolato)cobalt(III) Complexes in the Presence of Triethanolamine
Takeo AkiyamaYoshihiro WatanabeAkiko MiyasakaToru KomaiHirobumi UshijimaMasatsugu KajitaniKunio ShimizuAkira Sugimori
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1992 Volume 65 Issue 4 Pages 1047-1051

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Abstract

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 14. The irradiation with 254 nm light brings about decomposition of the complexes.

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© 1992 The Chemical Society of Japan
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