What is the oxidation state of iron in FeO4?

Solutions

Expert Solution

let x = oxidation number Fe

x + ( 4 x -2 )= -2
x - -8 = -2
x = +6
oxidation number Fe in FeO4 2- = +6

The experimentally known highest oxidation state of iron has been determined to be Fe(VI) so far. Here we report a combined matrix-isolation infrared spectroscopic and theoretical study of two interconvertible iron oxide anions: a dioxoiron peroxide complex [(η²-O₂)FeO₂]⁻ with a C_2v-structure and a tetroxide FeO₄⁻ with a D_2d tetrahedral structure, which are formed by co-condensation of laser-ablated iron atoms and electrons with O₂/Ar mixtures at 4 K. Quantum chemistry theoretical studies indicate that the Jahn–Teller distorted tetroxide FeO₄⁻ anion is a d¹ species with hereto the highest iron formal oxidation state Fe(VII).

queen_honey_blossom answered 1 year ago

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