Redox reactions of metal carbonyls of group 5A

Abstract

Redox reaction of V(CO)₆ with [Co(CO)₄]^–, [Mn(CO)₅]^–, [M₂(CO)₁₀]^2–, or [M(η⁵-C₅H₅)(CO)₃]^–(M = Cr, Mo, W), or Co(η⁵-C₅H₅)₂ occur rapidly at 25 °C and lower in hydrocarbons; on the other hand, V(CO)₆ is oxidized to V(η⁵-C₅H₅)(CO)₄ by Mn(η⁵-C₅H₅)₂ or Ni(η⁵-C₅H₅)₂ and the two-electron oxidation of [Nb(CO)₆]^– to the [Nb₂X₃(CO)₈]^–anion (X = Cl, Br, I, acetylacetonato), can be carried out using a number of oxidizing agents (Hg^II,CU^II,CU^IAg^I, or Fe^III).