When a reduced cytochrome transfers an electron from its Fe(II) to the bound O₂, · ABC26IN0294
Subject: Inorganic Chemistry · Chapter: Bioinorganic Chemistry · Topic: Bioinorganic – General · Exam: GATE 2005-2021 · Marks: 2 · Difficulty: Easy
When a reduced cytochrome transfers an electron from its Fe(II) to the bound $\mathrm{O_2}$,
(a)The bond oder of $\mathrm{O_2}$ is reduced by one and $v_{\mathrm{O_2}}$ decreases.
(b)A metal bound superoxide is formed and $v_{\mathrm{O_2}}$ decreases.
(c)A metal bound superoxide is formed and $v_{\mathrm{O_2}}$ increases.
(d)The bond order of $\mathrm{O_2}$ is reduced by one and $v_{\mathrm{O_2}}$ increases.
Answer
Answer: B ✓ checked by 4AB · confidence high
Explanation
One-electron transfer to O₂ gives bound superoxide (bond order 2 → 1.5) and ν(O–O) drops from ~1550 to ~1100 cm⁻¹ (b).
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