We have studied polarographic reduction ofπ-C5H5W(CO)3 compounds containing W-metal, W-halogen, and W-carbonσ-bonds.
The ease of reduction ofπ-C5H5M(CO)3 compounds, M(=Cr, Mo, W) containing M-M or M-halogen bonds decreases as we go from Cr to W, while that for W-halogenσ-bonds decreases in the order W-I > W-Br > W-C1.
The speed of an electrochemical reaction depends on the stability of the (Rθ, Xθ) anion formed by addition of an electron to the σ-bonded group.
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Denisovich, L.I., Gubin, S.P., Chapovskii, Y.A. et al. Polarography of π-cyclopentadienyltungstentricarbonyl compounds. Russ Chem Bull 17, 891–892 (1968). https://doi.org/10.1007/BF00905781
- Electrochemical Reaction
- Polarographic Reduction